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DOI	10.1016/j.scib.2020.04.010
	Plum pudding model inspired KVPO4F@3DC as high-voltage and hyperstable cathode for potassium ion batteries
	Liu Z.; Wang J.; Lu B.
发表日期	2020
ISSN	20959273
起始页码	1242
结束页码	1251
卷号	65 期号:15
英文摘要	The investigation on the cathode material of potassium ion batteries (PIBs), one of the most promising alternatives to lithium ion batteries, is of great significance. Potassium vanadium fluorophosphate (KVPO4F) with a high working voltage is an appealing cathode candidate for PIBs, while the poor cycling performance and low electronic conductivity dramatically hinder the application. Herein, a plum pudding model inspired three-dimensional amorphous carbon network modified KVPO4F composite (KVPO4F@3DC) is successfully designed in this study to tackle these problems. In the composite, KVPO4F particles are homogeneously wrapped by a layer of amorphous carbon and bridged by cross-linked large area carbon sheets. As the cathode for PIBs, the KVPO4F@3DC composite exhibits a high average operating voltage about 4.10 V with a super-high discharge capacity of 102.96 mAh g−1 at 20 mA g−1. An excellent long cycle stability with a capacity retention of 85.4% over 550 cycles at 500 mA g−1 is achieved. In addition, it maintains 83.6% of its initial capacity at 50 mA g−1 after 100 cycles at 55 °C. The design of KVPO4F@3DC with plum pudding structure provides facilitative electron conductive network and stable electrode/electrode interface for electrode, successfully innovating an ultra-stable and high-performance cathode material for potassium ion batteries. © 2020 Science China Press
关键词	Cathode High working voltage Plum pudding model Potassium ion batteries Potassium vanadium fluorophosphate
英文关键词	Amorphous carbon; Cathode materials; Cathodes; Electric discharges; Ions; Potassium compounds; Vanadium compounds; Amorphous carbon networks; Capacity retention; Conductive networks; Cycling performance; Discharge capacities; Electronic conductivity; Operating voltage; Working voltage; Lithium-ion batteries
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207137
作者单位	School of Physics and Electronics, Hunan University, Changsha, 410082, China; College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China; State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, China; Fujian Strait Research Institute of Industrial Graphene Technologies, Quanzhou, 362000, China
推荐引用方式 GB/T 7714	Liu Z.,Wang J.,Lu B.. Plum pudding model inspired KVPO4F@3DC as high-voltage and hyperstable cathode for potassium ion batteries[J],2020,65(15).
APA	Liu Z.,Wang J.,&Lu B..(2020).Plum pudding model inspired KVPO4F@3DC as high-voltage and hyperstable cathode for potassium ion batteries.Science Bulletin,65(15).
MLA	Liu Z.,et al."Plum pudding model inspired KVPO4F@3DC as high-voltage and hyperstable cathode for potassium ion batteries".Science Bulletin 65.15(2020).