Zhangxian Chen

Hefei University of Technology

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Weixin Zhang

Huazhong University of Science and Technology

Zeheng Yang

Hefei University of Technology

Weijian Tang

PLA Army Engineering University

Jianhui Su

Guangdong University of Technology

Hansong Cheng

China University of Geosciences

Chengzhi Hu

Chinese Academy of Sciences

Afei Li

Hefei University of Technology

Haijian Huang

Hefei University of Technology

Xiaoming Fan

Northeast Agricultural University

Kai Wang

First Affiliated Hospital of Anhui Medical University

Cooperative Institutions

Hefei University of Technology

Chinese Academy of Sciences

Hefei University

National University of Singapore

Fujian Medical University

University of Science and Technology of China

University of Chinese Academy of Sciences

Anhui University

China University of Geosciences

Fujian Provincial Cancer Hospital

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Perceived risk of death among patients with advanced cancer: a qualitative directed content analysis

BMC Palliative Care (2024)

Guojuan Chen Zhangxian Chen Huimin Xiao Jianwei Zheng Shangwang Yang

Risk perception with respect to death is a prerequisite for patients with advanced cancer when the time comes to make medical decisions. However, the nature of death risk perception remains unclear.

Pain medicine

Qualitative analysis

10.1186/s12904-024-01584-3

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Citations (0)

An effective etching-induced coating strategy to shield LiNi0.8Co0.1Mn0.1O2 electrode materials by LiAlO2

Journal of Power Sources (2018)

Weijian Tang Zhangxian Chen Fan Xiong Fei Chen Cheng Huang

Lithium hydroxide

10.1016/j.jpowsour.2018.11.062

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Citations (152)

An Antimony(III) Fluoride Oxalate with Large Birefringence

Chemistry - A European Journal (2020)

Yangxin Chen Zhangxian Chen Zhou Yang Yanqiang Li Youchao Liu

Abstract Birefringent materials play a key role in modulating the polarization of light and thus in optical communication as well as in laser techniques and science. Designing new, excellent birefringent materials remains a challenge. In this work, we designed and synthesized the first antimony(III) fluoride oxalate birefringent material, KSb 2 C 2 O 4 F 5 , by a combination of delocalized π‐conjugated [C 2 O 4 ] 2− groups, stereochemical active Sb 3+ cations, and the most electronegative element, fluorine. The [C 2 O 4 ] 2− groups are not in an optimal arrangement in the crystal structure of KSb 2 C 2 O 4 F 5 ; nonetheless, KSb 2 C 2 O 4 F 5 exhibits a large birefringence (Δ n =0.170 at 546 nm) that is even better than that of the well‐known commercial birefringent material α‐BaB 2 O 4 , even though the latter features an optimal arrangement of π‐conjugated [B 3 O 6 ] 3− groups. Based on first‐principles calculations, this prominent birefringence should be attributed to the alliance of planar π‐conjugated [C 2 O 4 ] 2− anions, highly distorted SbO 2 F 2 and SbOF 3 polyhedra with a stereochemically active lone pair. The combination of lone‐pair electrons and π‐conjugated systems boosts the birefringence to a large extent and will help the development of high‐performance birefringent materials.

Lone pair

10.1002/chem.202004934

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Citations (38)

Hierarchical micro/nanostructured WO3 with structural water for high-performance pseudocapacitors

Journal of Alloys and Compounds (2018)

Zongming Shao Xiaoming Fan Xiaoyu Liu Zeheng Yang Lei Wang

Pseudocapacitor

Nanorod

10.1016/j.jallcom.2018.06.192

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Preparation of single-crystal ternary cathode materials via recycling spent cathodes for high performance lithium-ion batteries

Nanoscale (2022)

Cheng Huang Xue Xia Ziwei Chi Zeheng Yang Haijian Huang

With the rapid consumption of lithium-ion batteries (LIBs), the recycling of spent LIBs is becoming imperative. However, the development of effective and environmentally friendly methods towards the recycling of spent LIBs, especially waste electrode materials, still remains a great challenge. Herein, on the basis of a Li-based molten salt, we have developed a facile and effective strategy to recycle spent polycrystalline ternary cathode materials into single-crystal cathodes. The regenerated plate-like single-crystal LiNi0.6Co0.2Mn0.2O2 material with exposed {010} planes achieves an excellent rate performance and outstanding cycling stability. In particular, a high capacity of 155.1 mA h g-1 and a superior capacity retention of 94.3% can be achieved by the recycled cathode material even after 240 cycles at 1 C. Meanwhile the single-crystal structure can be well reserved without any cracks or pulverization being observed. Moreover, this recycling method can be expanded to recycle other waste Ni-Co-Mn ternary cathode materials (NCM) or their mixtures for producing high-performance single-crystal cathode materials, demonstrating its versatility and flexibility in practical applications. Therefore, the strategy of converting spent NCM cathodes into single-crystal ones with satisfactory electrochemical performance may open up a cost-effective pathway for resolving the issues caused by the large amounts of spent LIBs, thus facilitating the sustainable development of LIBs.

10.1039/d2nr00993e

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Structural Reinforcement through High-Valence Nb Doping to Boost the Cycling Stability of Co-Free and Ni-Rich LiNi_0.9Mn_0.1O₂ Cathode Materials

Energy & Fuels (2023)

Chengzhi Hu Jingtao Ma Afei Li Cong Li Can Wang

As an important Co-free and Ni-rich layered oxide, LiNi0.9Mn0.1O2 (NM91) has garnered significant interest as a promising cathode material for lithium-ion batteries. Despite its attractively high specific capacity, the intrinsic structural instability poses a great challenge to its electrochemical performances, especially cycling performance. In this work, we circumvent the structural instability issue of NM91 through high-valence Nb doping. Our findings reveal that high-valence Nb5+ dopants were successfully incorporated into the lattice of LiNi0.9Mn0.1O2, functioning as interlayer pillars that reinforce the structure and mitigate the detrimental H2 → H3 phase transition. This results in greatly improved cycling stability and rate capability of the cathode. The discharge capacities of 1%Nb-NM91 reached 211.8 mA h g–1 at 0.1 C and 159.3 mA h g–1 at 5 C, with a retention rate of 95.6% after 100 cycles at 0.5 C, even superior to the previously reported lower Ni content counterparts, including LiNi0.8Co0.15Al0.05O2, LiNi0.8Co0.1Mn0.1O2, and so forth. This study demonstrates that high-valence Nb doping is a promising strategy to overcome the structural instability issue in LiNi0.9Mn0.1O2 and underscores the potential of Co-free Ni-rich layered oxides as cathode materials for lithium-ion batteries.

Cycling

Structural Stability

10.1021/acs.energyfuels.3c00699

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Citations (13)

Geometrical structures, and electronic and transport properties of a novel two-dimensional β-GaS transparent conductor

Nano Research (2015)

Zhangxian Chen Liang Huang Yongjie Xi Ran Li Wanchao Li

10.1007/s12274-015-0817-8

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Citations (3)

Studies on Heats of Formation for Tetrazole Derivatives with Density Functional Theory B3LYP Method

The Journal of Physical Chemistry A (1999)

Zhangxian Chen J. M. Xiao Hanmin Xiao Ying‐Nan Chiu

The heats of formation (HOF) for 49 tetrazole derivatives are calculated with the density functional theory (DFT) B3LYP method by means of designed isodemic and isogyric reactions. The average absolute deviation for five compounds for which the experimental HOFs are available is less than 2 kcal/mol target accuracy of G-2 theory. It has been demonstrated that for compounds involving delocalized bonds, choosing molecules containing all of the delocalized bonds as reference compounds is an appropriate approach. The calculated HOFs indicate that most neutral 2H-isomers are more stable than the corresponding 1H-isomers whereas the 1-substituted tetrazolate anions are more stable than the corresponding 2-substituted ones. Furthermore, our results consistently show that C-substituted tetrazoles are more stable than the corresponding N-substituted isomers. Our calculated heat of formation calls into question the experimental heat of formation of 2-methyltetrazole.

Tetrazole

Absolute deviation

10.1021/jp9903209

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Citations (200)

Fabrication of a proton exchange membrane via blended sulfonimide functionalized polyamide

Journal of Materials Science (2014)

Yunfeng Zhang Joycelyn Woo Yun Ting Rupesh Rohan Weiwei Cai Jing Li

A novel linear non-fluorinated sulfonimide functionalized polyamide (SPA) polymer electrolyte was successfully synthesized via an aromatic sulfonimide monomer with superior thermal stability and superacidity. The aromatic sulfonimide remains stable below 220 °C. To fabricate membranes with strong mechanical strength and dimensional stability, the polymer was blended with various quantities of PVdF. The PVdF/SPA blend membranes exhibit an excellent capacity of water uptake and high dimensional stability. However, their proton conductivity was found to be substantially lower than that of Nafion 211. Analysis on the SEM images of the PVdF/SPA blend membranes reveals that the low proton conductivity is primarily caused by the large pore structures (>1 μm), which lead to breakdown of the continuous proton transport channels.

Nafion

Thermal Stability

10.1007/s10853-014-8055-0

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Citations (39)

A highly atom-efficient strategy to synthesize reduced graphene oxide-Mn3O4 nanoparticles composites for supercapacitors

Journal of Alloys and Compounds (2016)

Jiangsheng Xu Xiaoming Fan Qing Xia Zongming Shao Bo Pei

10.1016/j.jallcom.2016.06.247

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Citations (43)