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 ...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.展开更多
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)+5 种基金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).
文摘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.
