气候变化领域集成服务门户(CCPortal): Robust high-temperature potassium-ion batteries enabled by carboxyl functional group energy storage

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DOI	10.1073/pnas.2110912118
	Robust high-temperature potassium-ion batteries enabled by carboxyl functional group energy storage
	Lu X.; Pan X.; Zhang D.; Fang Z.; Xu S.; Ma Y.; Liu Q.; Shao G.; Fu D.; Teng J.; Yang W.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:35
英文摘要	The popularly reported energy storage mechanisms of potassium-ion batteries (PIBs) are based on alloy-, de-intercalation-, and conversion-type processes, which inevitably lead to structural damage of the electrodes caused by intercalation/de-intercalation of K+ with a relatively large radius, which is accompanied by poor cycle stabilities. Here, we report the exploration of robust high-temperature PIBs enabled by a carboxyl functional group energy storage mechanism, which is based on an example of p-phthalic acid (PTA) with two carboxyl functional groups as the redox centers. In such a case, the intercalation/de-intercalation of K+ can be performed via surface reactions with relieved volume change, thus favoring excellent cycle stability for PIBs against high temperatures. As proof of concept, at the fixed working temperature of 62.5 °C, the initial discharge and charge specific capacities of the PTA electrode are ∼660 and 165 mA·h·g−1, respectively, at a current density of 100 mA·g−1, with 86% specific capacity retention after 160 cycles. Meanwhile, it delivers 81.5% specific capacity retention after 390 cycles under a high current density of 500 mA·g−1. The cycle stabilities achieved under both low and high current densities are the best among those of high-temperature PIBs reported previously. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Carboxyl functional groups; Cycle stability; High temperature; Potassium ion batteries
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238413
作者单位	College of Materials Science and Engineering, Hunan University, Changsha, 410082, China; Institute of Materials, Ningbo University of Technology, Ningbo, 315211, China; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
推荐引用方式 GB/T 7714	Lu X.,Pan X.,Zhang D.,et al. Robust high-temperature potassium-ion batteries enabled by carboxyl functional group energy storage[J],2021,118(35).
APA	Lu X..,Pan X..,Zhang D..,Fang Z..,Xu S..,...&Yang W..(2021).Robust high-temperature potassium-ion batteries enabled by carboxyl functional group energy storage.Proceedings of the National Academy of Sciences of the United States of America,118(35).
MLA	Lu X.,et al."Robust high-temperature potassium-ion batteries enabled by carboxyl functional group energy storage".Proceedings of the National Academy of Sciences of the United States of America 118.35(2021).