Boosting the energy density of sulfide-based all-solid-state batteries at low temperatures by charging to high voltages up to 6 V  

作　　者：Lun Zhang Xuedong Zhang Zhaoyu Rong Tao Wang Zhenyu Wang Zaifa Wang Longchen Zhang Qiao Huang Lingyun Zhu Liqiang Zhang Yongfu Tang Jianyu Huang 

机构地区：[1]Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China [2]Clean Nano Energy Center,State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China [3]Guilin Electrical Equipment Scientific Research Institute Co.,Ltd,Guilin 541004,China [4]GRINM(Guangdong)Institute for Advanced Materials and Technology,Foshan 528000,China [5]Hebei Key Laboratory of Applied Chemistry,College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China [6]School of Materials Science&Engineering,Anhui University,Hefei 230601,China

出　　处：《Nano Research》2023年第8期10966-10975,共10页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.22279112,51772262,5197010923,11575154,51971245,52022088,U20A20336,and 52002346);the Fok Ying-Tong Education Foundation of China(No.171064);the Natural Science Foundation of Hebei Province(Nos.B2022203018,B2018203297,B2020203037,and F2021203097);the Hebei One Hundred Talent Program(No.4570028);the High-Level Talents Research Program of the Yanshan University(Nos.00500021502 and 005000201);the Hebei Key Laboratory of Applied Chemistry after Operation Performance(No.22567616H);the Science and Technology Innovation Program of Hunan Province(No.2021RC3109);the Postgraduate Scientific Research Innovation Project of Xiangtan University(No.XDCX2022Y076).

摘　　要：Sulfide electrolyte-based all-solid-state batteries(ASSBs)are potential next generation energy storage technology due to the high ionic conductivity of sulfide electrolytes and potentially improved energy density and safety.However,the performance of ASSBs at/below subzero temperatures has not been explored systematically.Herein,low temperature(LT)performance of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)|Li_(9.54)Si_(1.74)P_(1.44)S11.7Cl_(0.3)(LiSPSCl)|Li_(4)Ti_(5)O_(12)(LTO)ASSBs was investigated.By charging the ASSB to 6 V at−40℃,a capacity of 100.7 mAh∙g^(−1)at 20 mA∙g^(−1)was achieved,which is much higher than that charged to 4.3 V(4.6 mAh∙g^(−1))at−40℃.Moreover,atomic resolution microscopy revealed that the NCM811 remained almost intact even after being charged to 6 V.In contrast,NCM811 was entirely destructed when charged to 6 V at room temperature.The sharp difference arises from the large internal charge transfer resistance at LT which requires high voltage to overcome.Nevertheless,such high voltage is not harmful to the active material but beneficial to extracting most energy out of the ASSBs at LT.We also demonstrated that thinner electrolyte is favorable for LT operation of ASSBs due to the reduced ion transfer distance.This work provides new strategies to boost the capacity and energy density of sulfide-based ASSBs at LT for dedicated LT applications.

关 键 词：all-solid-state lithium batteries sulfide solid electrolyte low temperature Li_(4)Ti_(5)O_(12)(LTO) 

分 类 号：TM912[电气工程—电力电子与电力传动]