Structural manipulation approaches towards enhanced sodium ionic   conductivity in Na-rich antiperovskites

doi:10.1016/j.jpowsour.2015.06.002

CORC > 北京大学 > 化学与分子工程学院

	Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites
	Wang, Yonggang ; Wang, Qingfei ; Liu, Zhenpu ; Zhou, Zhengyang ; Li, Shuai ; Zhu, Jinlong ; Zou, Ruqiang ; Wang, Yingxia ; Lin, Jianhua ; Zhao, Yusheng
刊名	JOURNAL OF POWER SOURCES
	2015
关键词	Antiperovskite Solid electrolyte Sodium ionic conductor Superionic CRYSTAL-STRUCTURE SUPERIONIC CONDUCTOR BATTERIES PEROVSKITE NAMGF3
DOI	10.1016/j.jpowsour.2015.06.002
英文摘要	High-performance solid electrolytes are critical for realizing all-solid-state batteries with enhanced safety and cycling efficiency. However, currently available candidates (sulfides and the NASICON-type ceramics) still suffer from drawbacks such as inflammability, high-cost and unfavorable machinability. Here we present the structural manipulation approaches to improve the sodium ionic conductivity in a series of affordable Na-rich antiperovskites. Experimentally, the whole solid solutions of Na3OX (X = Cl, Br, I) are synthesized via a facile and timesaving route from the cheapest raw materials (Na, NaOH and NaX). The materials are nonflammable, suitable for thermoplastic processing due to low melting temperatures (<300 degrees C) without decomposing. Notably, owing to the flexibility of perovskite-type structure, it's feasible to control the local structure features by means of size-mismatch substitution and unequivalent-doping for a favorable sodium ionic diffusion pathway. Enhancement of sodium ionic conductivity by 2 magnitudes is demonstrated by these chemical tuning methods. The optimized sodium ionic conductivity in Na2.9Sr0.05OBr0.6I0.4 bulk samples reaches 1.9 x 10(-3) S/cm at 200 degrees C and even higher at elevated temperature. We believe further chemical tuning efforts on Na-rich antiperovskites will promote their performance greatly for practical all-solid state battery applications. (C) 2015 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [51322205, 21371014]; New Star Program of Beijing Committee of Science and Technology [2012004]; Ministry of education program for New Century Excellent Talents of China [NCET-11-0027]; SCI(E); EI; ARTICLE; rzou@pku.edu.cn; yusheng.zhao@unlv.edu; 735-740; 293
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/415705]
专题	化学与分子工程学院工学院
推荐引用方式 GB/T 7714	Wang, Yonggang,Wang, Qingfei,Liu, Zhenpu,et al. Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites[J]. JOURNAL OF POWER SOURCES,2015.
APA	Wang, Yonggang.,Wang, Qingfei.,Liu, Zhenpu.,Zhou, Zhengyang.,Li, Shuai.,...&Zhao, Yusheng.(2015).Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites.JOURNAL OF POWER SOURCES.
MLA	Wang, Yonggang,et al."Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites".JOURNAL OF POWER SOURCES (2015).