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Article ; Online: Controllable reduction of NiCoO2@NiCo core–shell nanospheres on CNTs for high-performance electrochemical energy storage

Wang, B.Q. / Gong, S.H. / Wang, X.C. / Wu, J.F. / Liu, F. / Cheng, J.P.

Journal of Colloid And Interface Science. 2023 Sept., v. 645 p.154-164

2023

Abstract: The performances of energy storage devices are strongly dependent on the electrode materials. Owing to the high theoretical capacity, NiCoO₂ is a promising transition metal oxide for supercapacitors. Despite many efforts have been devoted, it still lacks ...

Abstract	The performances of energy storage devices are strongly dependent on the electrode materials. Owing to the high theoretical capacity, NiCoO₂ is a promising transition metal oxide for supercapacitors. Despite many efforts have been devoted, it still lacks of effective methods to overcome its shortcomings such as low conductivity and poor stability, in order to achieve its theoretical capacity. Herein, utilizing the thermal reducibility of trisodium citrate and its hydrolyzate, a series of NiCoO₂@NiCo/CNT ternary composites in which NiCoO₂@NiCo core–shell nanospheres deposited on CNT surface with adjustable metal contents are synthesized. Benefiting from the enhanced synergistic effect of both metallic core and CNTs, the optimized composite exhibits an extremely high specific capacitance (2660 F g⁻¹ at 1 A g⁻¹, the effective specific capacitance of the loaded metal oxide is 4199 F g⁻¹, close to the theoretical value), an excellent rate performance and stability, when the metal content is about 37%. After depolarized calculation, the energy storage mechanism of the composite is reasonably analyzed. By controlling the contents of hexamethylenetetramine, trisodium citrate and CNTs in the reactant, the roles of them are distinguished. This study reveals an efficient novel strategy for transition metal oxides to maximize the electrochemical performances.
Keywords	capacitance ; citrates ; electrochemical capacitors ; electrochemistry ; electrodes ; energy ; hydrolysates ; nanospheres ; synergism ; NiCoO2 ; Thermal reduction ; Supercapacitors ; Carbon nanotubes
Language	English
Dates of publication	2023-09
Size	p. 154-164.
Publishing place	Elsevier Inc.
Document type	Article ; Online
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2023.04.134
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Article ; Online: Fe

Gong, S H / Kuai, J / Wang, J D / Liu, F / Wu, J F / Wang, X C / Cheng, J P

Nanotechnology

2023 Volume 34, Issue 50

Abstract: ... ...

Abstract	Fe
Language	English
Publishing date	2023-10-04
Publishing country	England
Document type	Journal Article
ZDB-ID	1362365-5
ISSN	1361-6528 ; 0957-4484
ISSN (online)	1361-6528
ISSN	0957-4484
DOI	10.1088/1361-6528/acf9af
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Article ; Online: Uniform Fe

Xu, Junming / Wei, Ke / Wu, Jianfeng / Wu, Jun / Zhou, Tao / Cheng, J P / Hu, Xiaoping

ChemPlusChem

2023 Volume 88, Issue 9, Page(s) e202300315

Abstract: Ni-Fe battery is one of prospective aqueous alkaline batteries due to its high safety, eco-friendliness and cost-effectiveness. However, the electrochemical performance of Fe-based anodes is limited due to the particle aggregation and low electric ... ...

Abstract	Ni-Fe battery is one of prospective aqueous alkaline batteries due to its high safety, eco-friendliness and cost-effectiveness. However, the electrochemical performance of Fe-based anodes is limited due to the particle aggregation and low electric conductivity. In this work, iron powder is used as a precursor in a chemical bath deposition method. By optimizing the concentration of HNO
Language	English
Publishing date	2023-08-08
Publishing country	Germany
Document type	Journal Article
ISSN	2192-6506
ISSN (online)	2192-6506
DOI	10.1002/cplu.202300315
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Article ; Online: Controllable reduction of NiCoO

Wang, B Q / Gong, S H / Wang, X C / Wu, J F / Liu, F / Cheng, J P

Journal of colloid and interface science

2023 Volume 645, Page(s) 154–164

Abstract: The performances of energy storage devices are strongly dependent on the electrode materials. Owing to the high theoretical capacity, ... ...

Abstract	The performances of energy storage devices are strongly dependent on the electrode materials. Owing to the high theoretical capacity, NiCoO
Language	English
Publishing date	2023-04-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2023.04.134
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Superior rate-capability and long-lifespan carbon nanotube-in-nanotube@Sb₂S₃ anode for lithium-ion storage

Yang, Z. Y. / Yuan, Y. F. / Zhu, M. / Yin, S. M. / Cheng, J. P. / Guo, S. Y.

Journal of materials chemistry A. 2021 Oct. 12, v. 9, no. 39

2021

Abstract: It is vital to improve the rate capability and cycling performance of Sb₂S₃ to promote its application in lithium-ion batteries. Herein, Sb₂S₃ is successfully anchored inside a carbon nanotube-in-nanotube via a multi-step method based on a metal–organic ... ...

Abstract	It is vital to improve the rate capability and cycling performance of Sb₂S₃ to promote its application in lithium-ion batteries. Herein, Sb₂S₃ is successfully anchored inside a carbon nanotube-in-nanotube via a multi-step method based on a metal–organic framework and carbon nanotubes. The composite has a large specific surface area (48.1 m² g⁻¹), relatively high content of Sb₂S₃ (57%), and an external highly conductive nitrogen-doped amorphous carbon nanotube. Benefitting from these advanced structure advantages, such as well-confined Sb₂S₃, completely closed internal void space, highly conductive carbon matrix, and formation of C–S covalent bonds, the composite exhibits superior lithium storage performance. The rate capability is its highlight. Even at 15 A g⁻¹, the discharge capacity still reaches 361 mA h g⁻¹. After the rate test, a cycling test at 5 A g⁻¹ up to 400 cycles demonstrates its excellent structural stability. The cycling performance is very impressive (710.5 mA h g⁻¹ at 1 A g⁻¹ after 1500 cycles, 316 mA h g⁻¹ at 5 A g⁻¹ after 1700 cycles, 201.5 mA h g⁻¹ at 10 A g⁻¹ after 1000 cycles). The reversible capacity is outstanding (1117.2 mA h g⁻¹ at 0.1 A g⁻¹). Electrochemical kinetic analyses and ex situ observation of the cycled composite are studied in detail to comprehensively elucidate its electrochemical mechanism. It can be concluded that carbon nanotube-in-nanotube@Sb₂S₃ is a promising anode material for high-performance lithium-ion batteries.
Keywords	anodes ; carbon ; carbon nanotubes ; coordination polymers ; electrochemistry ; lithium ; surface area
Language	English
Dates of publication	2021-1012
Size	p. 22334-22346.
Publishing place	The Royal Society of Chemistry
Document type	Article
ZDB-ID	2702232-8
ISSN	2050-7496 ; 2050-7488
ISSN (online)	2050-7496
ISSN	2050-7488
DOI	10.1039/d1ta06708g
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: NiCoO

Gong, S H / Wang, B Q / Xue, Y / Sun, Q S / Wang, J / Kuai, J / Liu, F / Cheng, J P

Journal of colloid and interface science

2022 Volume 628, Issue Pt A, Page(s) 343–355

Abstract: Designing optimized nano-sized architecture is a promising approach to prepare high-performance electrode materials for supercapacitors. In this work, a hierarchical multi-shelled structure has been successfully synthesized, which consists of a 3D carbon ...

Abstract	Designing optimized nano-sized architecture is a promising approach to prepare high-performance electrode materials for supercapacitors. In this work, a hierarchical multi-shelled structure has been successfully synthesized, which consists of a 3D carbon nanofiber network as a supporting scaffold prepared by carbonization of aramid nanofiber aerogel, an intermediate polypyrrole (PPy) bonding layer and a NiCoO
Language	English
Publishing date	2022-07-25
Publishing country	United States
Document type	Journal Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2022.07.134
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Modeling the charge collection efficiency in the Li-diffused inactive layer of P-type high purity germanium detector.

Dai, W H / Ma, H / Yue, Q / Yang, L T / Zeng, Z / Cheng, J P / Li, J L

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

2022 Volume 193, Page(s) 110638

Abstract: A model of the Li-diffused inactive layer in P-type high purity germanium detectors is built to describe the transportation of charge carriers and calculate the charge collection efficiency therein. The model is applied to calculate charge collection ... ...

Abstract	A model of the Li-diffused inactive layer in P-type high purity germanium detectors is built to describe the transportation of charge carriers and calculate the charge collection efficiency therein. The model is applied to calculate charge collection efficiency of a P-type point-contact germanium detector used in rare event physics experiments and validated in another P-type semi-planar germanium detector. The calculated charge collection efficiency curves are well consistent with measurements for both detectors. Effects of the Li doping processes on the charge collection efficiency are discussed based on the model. This model can be easily extended to other P-type germanium detectors, for instance, the P-type broad-energy Ge detector, and the P-type inverted-coaxial point-contact detector.
Language	English
Publishing date	2022-12-26
Publishing country	England
Document type	Journal Article
ZDB-ID	1142596-9
ISSN	1872-9800 ; 0883-2889 ; 0969-8043
ISSN (online)	1872-9800
ISSN	0883-2889 ; 0969-8043
DOI	10.1016/j.apradiso.2022.110638
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Article: NiCoO2 and polypyrrole decorated three-dimensional carbon nanofiber network with coaxial cable-like structure for high-performance supercapacitors

Gong, S.H. / Wang, B.Q. / Xue, Y. / Sun, Q.S. / Wang, J. / Kuai, J. / Liu, F. / Cheng, J.P.

Journal of colloid and interface science. 2022 July 21,

2022

Abstract	Designing optimized nano-sized architecture is a promising approach to prepare high-performance electrode materials for supercapacitors. In this work, a hierarchical multi-shelled structure has been successfully synthesized, which consists of a 3D carbon nanofiber network as a supporting scaffold prepared by carbonization of aramid nanofiber aerogel, an intermediate polypyrrole (PPy) bonding layer and a NiCoO₂ outer shell, just like a coaxial cable in the structure. The intermediate PPy layer facilitates the uniform deposition of NiCoO₂ by providing more anchor sites, and enhances the electrical contact between carbon nanofiber network and NiCoO₂ shell due to its high conductivity and good compatibility with two different substances. The synergistic effect of the hierarchical configuration endows the electrode material with a high specific capacitance of 1037 F g⁻¹at 1 A g⁻¹and excellent cycling stability (∼89% of initial capacitance after 7000 cycles). Moreover, an asymmetric supercapacitor based on the composite and activated carbon achieves a high energy density of 37.7 Wh kg⁻¹ at a power density of 465 W kg⁻¹ in 1.65 V. This work may provide a feasible strategy to design high-performance hybrid electrodes for energy storage devices.
Keywords	activated carbon ; aerogels ; capacitance ; carbon nanofibers ; carbonization ; electrochemical capacitors ; electrodes ; energy ; energy density ; pyrroles ; synergism
Language	English
Dates of publication	2022-0721
Publishing place	Elsevier Inc.
Document type	Article
Note	Pre-press version
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2022.07.134
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Article ; Online: Patients' Reports of Traumatic Experience and Posttraumatic Stress in Psychiatric Settings.

Wu, K K / Cheng, J P / Leung, J / Chow, L P / Lee, C C

East Asian archives of psychiatry : official journal of the Hong Kong College of Psychiatrists = Dong Ya jing shen ke xue zhi : Xianggang jing shen ke yi xue yuan qi kan

2020 Volume 30, Issue 1, Page(s) 3–11

Abstract: Objective: To determine the prevalence of traumatic experience (TE) among patients in psychiatric settings in Hong Kong and the associations between TE and levels of distress and anxiety and depressive symptoms.: Methods: 129 patients who have ... ...

Abstract	Objective: To determine the prevalence of traumatic experience (TE) among patients in psychiatric settings in Hong Kong and the associations between TE and levels of distress and anxiety and depressive symptoms. Methods: 129 patients who have received inpatient psychiatric services were recruited. Their lifetime TE was assessed using the Life Event Checklist (LEC), and TE in psychiatric settings using the Psychiatric Experiences Questionnaire (PEQ). Their level of distress symptoms was assessed using the Impact of Event Scale-Revised (IES-R), and the level of anxiety and depressive symptoms using the Hospital Anxiety and Depression Scale (HADS). Results: The prevalence of direct and indirect TE was 84.5%, as was the prevalence of TE in psychiatric settings. Common TE in psychiatric settings included witnessing another patient being taken down (61.2%), being put in restraints of any kind (41.1%), and witnessing another patient being physically assaulted by another patient (36.4%). TE in psychiatric settings associated with high prevalence of severe or extreme distress 1 week after the event included being forced to take medication against their will (52.2%), being threatened with physical violence (52.2%), and experiencing a physical assault (50.0%). Lifetime TE (the total number of LEC items reported) was associated with severity of distress and anxiety and depressive symptoms, whereas TE in psychiatric settings (the total number of PEQ items reported) was associated with severity of distress only. The total number of LEC items reported is the only predictor of levels of distress and anxiety and depressive symptoms. Conclusions: Lifetime TE and TE in psychiatric settings are common among patients with SMI. Trauma-informed care is suggested for mental health services.
MeSH term(s)	Adult ; Anxiety Disorders/epidemiology ; Anxiety Disorders/psychology ; Depression/complications ; Depression/epidemiology ; Depression/psychology ; Female ; Hong Kong/epidemiology ; Humans ; Inpatients/psychology ; Inpatients/statistics & numerical data ; Male ; Patient Safety/statistics & numerical data ; Prevalence ; Residential Facilities/statistics & numerical data ; Stress Disorders, Post-Traumatic/complications ; Stress Disorders, Post-Traumatic/epidemiology ; Stress Disorders, Post-Traumatic/psychology ; Surveys and Questionnaires
Language	English
Publishing date	2020-03-30
Publishing country	China
Document type	Journal Article
ZDB-ID	2568836-4
ISSN	2224-7041 ; 2078-9947
ISSN (online)	2224-7041
ISSN	2078-9947
DOI	10.12809/eaap1880
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Posttraumatic Stress, Anxiety, and Depression in COVID-19 Survivors.

Wu, K K / Lee, D / Sze, A M / Ng, V N / Cho, V W / Cheng, J P / Wong, M M / Cheung, S F / Tsang, O T

East Asian archives of psychiatry : official journal of the Hong Kong College of Psychiatrists = Dong Ya jing shen ke xue zhi : Xianggang jing shen ke yi xue yuan qi kan

2022 Volume 32, Issue 1, Page(s) 5–10

Abstract: Objectives: This study aims to examine the rates of anxiety, depression, and posttraumatic stress disorder (PTSD) after hospital discharge among COVID-19 survivors and to determine the associated risk factors.: Methods: Adult COVID-19 survivors ... ...

Abstract	Objectives: This study aims to examine the rates of anxiety, depression, and posttraumatic stress disorder (PTSD) after hospital discharge among COVID-19 survivors and to determine the associated risk factors. Methods: Adult COVID-19 survivors discharged from hospitals between March 2020 and March 2021 were asked to complete a questionnaire at 4 weeks after discharge. The Chinese version of the 22-item Impact of Event Scale - Revised (IES-R) was used to measure symptoms of PTSD. The 9-item Patient Health Questionnaire (PHQ-9) was used to assess symptoms of major depressive disorder. The 7-item Generalised Anxiety Disorder Scale (GAD-7) was used to measure symptoms of generalised anxiety disorder. The rates of anxiety, depression, and PTSD among discharged patients were determined, as were associations between psychosocial factors and outcome measures and predictors for moderate-tosevere symptoms of anxiety, depression, and PTSD. Results: 96 men and 103 women aged 18 to 81 years returned the completed questionnaire. 12.1% to 20.1% of them reported symptoms of PTSD, anxiety, or depression. Higher symptom severity was associated with higher perceived life threat, lower emotional support, lower disease severity upon admission, and longer hospital stay. Women had more PTSD symptoms than men, particularly when knowing someone under quarantine. Conclusion: COVID-19 survivors with higher perceived life threat, lower emotional support, lower disease severity upon admission, and longer hospital stay were associated with higher severity of symptoms of PTSD, anxiety, and depression. Timely intervention should provide to at-risk survivors.
MeSH term(s)	Adolescent ; Adult ; Aged ; Aged, 80 and over ; Anxiety/epidemiology ; Anxiety Disorders/complications ; Anxiety Disorders/epidemiology ; COVID-19/epidemiology ; Depression/epidemiology ; Depressive Disorder, Major/complications ; Female ; Humans ; Male ; Middle Aged ; Stress Disorders, Post-Traumatic/etiology ; Survivors ; Young Adult
Language	English
Publishing date	2022-03-24
Publishing country	China
Document type	Journal Article
ZDB-ID	2568836-4
ISSN	2224-7041 ; 2224-7041
ISSN (online)	2224-7041
ISSN	2224-7041
DOI	10.12809/eaap2176
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