Perovskite fluoride NaNiF_(3) with hollow micron sphere structure as anode for Li-ion hybrid capacitors  

作　　者：Ai-Jun Jiao Jian-Fei Gao Zheng-Hua He Jing-Feng Hou Ling-Bin Kong 

机构地区：[1]State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals,Lanzhou University of Technology,Lanzhou,730050,China

出　　处：《Rare Metals》2022年第10期3370-3380,共11页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.51971104 and 51762031);the Key Research Program of Education Department of Gansu Province (No.GSSYLXM-03)。

摘　　要：Lithium-ion hybrid capacitors(LIHCs) are gaining more attention and applications because they break the performance limitations of supercapacitors(SCs) and lithium-ion batteries(LIBs).However,the difference of energy storage mechanism between anode and cathode is a problem that must be faced by Li-ion hybrid capacitors.The selection of suitable anode and cathode materials is one of the effective ways to solve this problem.Here,we synthesized hollow spherical perovskite fluoride NaNiF3 by a simple and safe method.The specific capacity of NaNiF3 is 142 mAh·g^(-1) at 0.1 A·g^(-1) for 1000 cycles.The mechanism in the cycling of NaNiF3 electrodes was investigated using ex situ X-ray photoelectron spectroscopy(XPS),which is typical of the conversion reaction.Meanwhile,the NaNiF_(3)//activated carbon(AC) Li-ion hybrid capacitor assembled and showed better energy density(69 Wh·kg^(-1)) and power density(5699 W·kg^(-1)).Its capacity retention after long cycling was 79%.The use of NaNiF3 expands the choice of electrode materials for LIHCs and extends their practical applications.

关 键 词：Perovskite fluoride ANODE Conversion mechanism Li-ion hybrid capacitor 

分 类 号：TM53[电气工程—电器] TQ131.12[化学工程—无机化工]