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14. Lithium Argyrodite as Solid Electrolyte and Cathode Precursor for Solid‐State Batteries with Long Cycle Life

Author

Wang, Shuo, primary, Tang, Mingxue, additional, Zhang, Qinghua, additional, Li, Baohua, additional, Ohno, Saneyuki, additional, Walther, Felix, additional, Pan, Ruijun, additional, Xu, Xiaofu, additional, Xin, Chengzhou, additional, Zhang, Wenbo, additional, Li, Liangliang, additional, Shen, Yang, additional, Richter, Felix H., additional, Janek, Jürgen, additional, and Nan, Ce‐Wen, additional

Published
2021
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19. Composite Cathodes with Succinonitrile‐Based Ionic Conductors for Long‐Cycle‐Life Solid‐State Lithium Metal Batteries.

Author

Xin, Chengzhou, Wen, Kaihua, Xue, Chuanjiao, Wang, Shuo, Liang, Ying, Wu, Xinbin, Li, Liangliang, and Nan, Ce‐Wen

Subjects
SOLID state batteries, POLYELECTROLYTES, LITHIUM cells, CATHODES, SOLID electrolytes, INTERFACIAL resistance, ENERGY density, DIFLUOROETHYLENE
Abstract

Poor interfacial contacts between cathode active materials and solid‐state electrolytes in solid‐state lithium (Li) metal batteries often lead to a poor Li‐ion conductive pathway, and thus a short cycle life and a low energy density. In this work, we synthesized succinonitrile (SCN)‐based ionic conductors (ICs) with different flowability at room temperature for using in the composite cathodes and investigated the effect of the ICs on the cycle performance of the solid‐state Li metal batteries with a poly(vinylidene fluoride) (PVDF)‐based polymer electrolyte separator. Our results showed that the gel‐like SCN‐LiClO4 IC was superior to the flowable SCN‐LiTFSI [lithium bis(trifluoromethanesulfonyl)imide] IC and the rigid SCN‐LiClO4 IC. The gel‐like IC can build an effective Li‐ion conduction path in the cathodes, establish a stable cathode/electrolyte interface with a small interfacial resistance change during cycling, and allow a high mass loading of active materials, which enables a long cycle life and high energy density of solid‐state batteries. [ABSTRACT FROM AUTHOR]

Published
2022
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23. Enhanced Cycle Stability of Na2Ti3O7Nanosheets Grown in Situon Nickel Foam as an Anode for Sodium-Ion Batteries

Author

Chen, Zehua, Zhang, Qixiang, Lu, Liang, Chen, Xingying, Wang, Shuo, Xin, Chengzhou, Xing, Baolin, and Zhang, Chuanxiang

Abstract

In this work, a Na2Ti3O7nanosheets@nickel foam material prepared through a hydrothermal synthesis method is applied as an electrode material for sodium batteries without any conductive carbon black or binder. Nickel foam promotes the uniform dispersion of the Na2Ti3O7nanosheets and contributes to improve the conductivity. In particular, the Na2Ti3O7nanosheets@nickel foam structure not only provides an electronic transport channel but also increases the structural stability of the material during charge and discharge and further promotes the reaction kinetics of the electrode during charging and discharging. The initial capacity of the Na2Ti3O7nanosheets@nickel foam reaches approximately 300.2 mAh g–1at a current density of 20 mA g–1. The capacity reaches 96.4, 67.2, and 50.1 mAh g–1at current densities of 100, 200, and 400 mA g–1, respectively. The capacity can reach 140 mAh g–1at 50 mA g–1and still reaches 81.7 mAh g–1after 500 cycles. The results show that the Na2Ti3O7nanosheets@nickel foam structure can effectively overcome the disadvantage of the poor ion/electron conductivity of Na2Ti3O7when used as an electrode material for sodium batteries. Therefore, Na2Ti3O7nanosheets@nickel foam without a binder or conductive additive is a promising anode material for sodium-ion batteries.

Published
2020
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24. High-performance Li6PS5Cl-based all-solid-state lithium-ion batteries.

Author

Wang, Shuo, Xu, Xiaofu, Zhang, Xue, Xin, Chengzhou, Xu, Bingqing, Li, Liangliang, Lin, Yuan-Hua, Shen, Yang, Li, Baohua, and Nan, Ce-Wen

Abstract

All-solid-state lithium-ion batteries (ASSLIBs) owing to their advantage of enhanced safety are considered to be a promising candidate for next-generation energy storage devices. However, the poor cycling performance and low areal capacities of ASSLIBs with S, Li2S or traditional oxide cathodes hinder the development of high-energy-density ASSLIBs. Herein, a Li6PS5Cl solid-state electrolyte has been systematically investigated for use as a cathode active material in ASSLIBs for the first time. ASSLIBs employing Li6PS5Cl as both the active material and electrolyte with a Li–In alloy anode are fabricated. A Li6PS5Cl-based cell with an active material loading of 3.1 mg cm−2 exhibits a high discharge capacity of around 535 mA h g−1 after 650 cycles at 56 mA g−1 (∼0.1C) at room temperature, which is the highest value among ASSLIBs using sulfide SSEs as active materials and is even comparable with those of cells with S, Li2S or transition metal sulfides as the active material. This superior long-term cycling performance is attributed to the highly reversible electrochemical activity of Li6PS5Cl revealed by ex situ XRD and XPS analyses. [ABSTRACT FROM AUTHOR]

Published
2019
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