Capacitance-enhanced sodium-ion storage in nitrogen-rich hard carbon

被引：118

作者：

Gaddam, Rohit Ranganathan ^{[1
]}

Niaei, Amir H. Farokh ^{[2
]}

Hankel, Marlies ^{[2
]}

Searles, Debra J. ^{[2
,3
]}

Kumar, Nanjundan Ashok ^{[1
]}

Zhao, X. S. ^{[1
]}

机构：

[1] Univ Queensland, Sch Chem Engn, St Lucia, Qld 4072, Australia

[2] Univ Queensland, Ctr Theoret & Computat Mol Sci, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia

[3] Univ Queensland, Sch Chem & Mol Biosci, Brisbane, Qld 4072, Australia

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2017年 / 5卷 / 42期

基金：

澳大利亚研究理事会;

关键词：

HIGH-PERFORMANCE SODIUM; GRAPHENE OXIDE FRAMEWORKS; ANODE MATERIAL; BATTERY ANODES; LITHIUM; COMPOSITES; NANOSHEETS; REDUCTION; SHEETS; ETHYLENEDIAMINE;

D O I：

10.1039/c7ta06754b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We demonstrate an approach to prepare nitrogen-rich hard carbon (N-HCS) from biomass as a robust anode material for sodium-ion batteries. A reversible capacity of similar to 520 mA h g(-1) at a current density of 20 mA g(-1) along with an excellent rate performance was obtained. When cycled at a high current density of 1 A g(-1), the N-HCS was stable for over 1000 cycles delivering a capacity of similar to 204 mA h g(-1). Density functional theory (DFT) computations verified that nitrogen doping enhances the interaction of sodium ions with the carbon, leading to a significantly improved storage capacity. This work provides new physical insights into the relationship between sodium-ion storage and nitrogen-containing hard carbon materials.

引用

页码：22186 / 22192

页数：7

共 53 条

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