Surface oxo-functionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Li-ion storage

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	Surface oxo-functionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Li-ion storage
	Xia, Yonggao; Fu, Rusheng; Chang, Zhenzhen; Shen, Chengxu; Guo, Haocheng; Huang, Heran; Liu, Zhaoping
刊名	ELECTROCHIMICA ACTA
	2018
卷号	260 页码:430-438
关键词	High-performance Intercalation Pseudocapacitance Rechargeable Batteries Organic Electrode Energy-storage Lithium Supercapacitors Sodium Anode Nitrogen
英文摘要	Hard carbon is emerging as a highly promising material for power-demanded energy storage devices. Recently, introducing heteroatom such as oxygen is confirmed to be available to improve the capacity. However, it remains a significant challenge to achieve simultaneously superior high-rate capability and long-term cycling stability. Here we demonstrate that the surface oxo-funcitionalized hard carbon spheres (o-HCS, 4.2m(2) g(-1)) derived from mild oxidative approach enhance pseudocapacitance lithiumion storage with improved Li-ion diffusivity and thus exhibit high-rate capacity and long cycle life in both Li-ion batteries and Li-ion capacitors. The o-HCS electrode delivers specific capacity of around 275 mAh g(-1) at 744mA g(-1) (2C) and capacity retention of above 92.0% and about 86.5% after 1100 and 1700 cycles, respectively. Impressively, it delivers above 110mAh g(-1) at extreme high current density of 14.88 A g(-1) (40C). As well, o-HCS electrode in Li-ion capacitor shows a capacitance of 34.8 F g(-1) (corresponding to 48.5 Whkg(-1) and 3.6 kW kg(-1)) at the current density of 3720 mA g(-1), and after 7000 cycles the capacity retention is 96% (similar to 0.057% decay per cycle). (c) 2017 Elsevier Ltd. All rights reserved.
学科主题	Chemistry ; Crystallography
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/16881]
专题	2018专题
推荐引用方式 GB/T 7714	Xia, Yonggao,Fu, Rusheng,Chang, Zhenzhen,et al. Surface oxo-functionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Li-ion storage[J]. ELECTROCHIMICA ACTA,2018,260:430-438.
APA	Xia, Yonggao.,Fu, Rusheng.,Chang, Zhenzhen.,Shen, Chengxu.,Guo, Haocheng.,...&Liu, Zhaoping.(2018).Surface oxo-functionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Li-ion storage.ELECTROCHIMICA ACTA,260,430-438.
MLA	Xia, Yonggao,et al."Surface oxo-functionalized hard carbon spheres enabled superior high-rate capability and long-cycle stability for Li-ion storage".ELECTROCHIMICA ACTA 260(2018):430-438.