High rate and ultralong life flexible all-solid-state zinc ion battery based on electron density modulated NiCo_(2)O_(4) nanosheets

作     者：Wenda Qiu Yunlei Tian Zhenchao Lin Shuting Lin Zhangqi Geng Kaitao Huang Aihua Lei Fuchun Huang Huajie Feng Fengze Ding Yu Li Xihong Lu Wenda Qiu;Yunlei Tian;Zhenchao Lin;Shuting Lin;Zhangqi Geng;Kaitao Huang;Aihua Lei;Fuchun Huang;Huajie Feng;Fengze Ding;Yu Li;Xihong Lu

作者机构：Guangdong Industry Polytechnic CollegeGuangzhou 510300GuangdongChina MOE of the Key Laboratory of Bioinorganic and Synthetic ChemistryKLGHEI of Environment and Energy ChemistrySchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan ProvinceHainan Normal UniversityHaikou 571158HainanChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第7期

页      面：283-291,I0008页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the Basic and Applied Basic Research Project of Guangdong Province(2019A1515110827) the Science and Technology Planning Project of Guangzhou(202102080169) the Education Commission of Guangdong Province(2019GKTSCX015) the Advanced Functional Materials Scientific Research and Technical Service Team(X20190197) Guangdong Training Programs of Scientific and Technological Innovation for Undergraduates(pdjh2021a0715) the Innovation Training Program for Undergraduate of Hainan Normal University(2021024)。 

主　　题：Electron densities modulation NiCo_(2)O_(4)nanosheets All-solid-state Flexible Zinc ion batteries 

摘      要：The development of zinc ion batteries (ZIBs) with large capacity,high rate,and durable cathode material is a crucial and urgent task.Ni Co_(2)O_(4)(NCO) has received ever-growing interest as a potential cathode material for ZIBs,owing to the high theoretical capacity,rich source,cost-effective,and versatile redox nature.However,due to the slow dynamics of the NCO electrodes,its practical application in highperformance systems is severely limited.Herein,we report an electron density modulated NCO nanosheets (N-NCO NSs) with high-kinetics Zn^(2+)-storage capability as an additive-free cathode for flexible all-solid-state (ASS) ZIBs.By virtue of the enhanced electronic conductivity,improved reaction kinetics,and increased active sites,the optimized N-NCO NSs electrode delivers a high capacity of 357.7 m Ah g^(-1)at 1.0 A g^(-1)and a superior rate capacity of 201.4 m Ah g^(-1)at 20 A g^(-1).More importantly,a flexible ASS ZIBs device is manufactured using a solid polymer electrolyte of a poly (vinylidene fluoride hexafluoropropylene)(PVDF-HFP) film.The flexible ASS ZIBs device shows superb durability with 80.2%capacity retention after 20,000 cycles and works well in the range of-20–70℃.Furthermore,the flexible ASS ZIBs achieves an impressive energy density as high as 578.1 W h kg^(-1)with a peak power density of 33.6 k W kg^(-1),substantially outperforming those latest ZIBs.This work could provide valuable insights for constructing high-kinetics and high-capability cathodes with long-term stability for flexible ASS ZIBs.