A Facile Route to Synthesize Sheet-like Na2Ti3O7 with Improved Sodium Storage Properties

doi:10.1007/s40242-015-4422-x

高等学校化学研究 ›› 2015, Vol. 31 ›› Issue (3): 443-446.doi: 10.1007/s40242-015-4422-x

A Facile Route to Synthesize Sheet-like Na₂Ti₃O₇ with Improved Sodium Storage Properties

XIE Man^1,2, WANG Kangkang¹, CHEN Renjie^1,2, LI Li^1,2, WU Feng^1,2

1. Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing 100081, P. R. China;
2. National Development Center of High Technology Green Materials, Beijing Institute of Technology, Beijing 100081, P. R. China

收稿日期:2014-11-06 修回日期:2014-12-31 出版日期:2015-06-01 发布日期:2015-02-12
通讯作者: CHEN Renjie E-mail:chenrj@bit.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(No.21373028).

A Facile Route to Synthesize Sheet-like Na₂Ti₃O₇ with Improved Sodium Storage Properties

XIE Man^1,2, WANG Kangkang¹, CHEN Renjie^1,2, LI Li^1,2, WU Feng^1,2

1. Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing 100081, P. R. China;
2. National Development Center of High Technology Green Materials, Beijing Institute of Technology, Beijing 100081, P. R. China

Received:2014-11-06 Revised:2014-12-31 Online:2015-06-01 Published:2015-02-12
Contact: CHEN Renjie E-mail:chenrj@bit.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21373028).

摘要/Abstract

摘要：

A high purity sheet-like Na₂Ti₃O₇ material was synthesized by a new facile solid-state method with hollow sphere TiO₂ as titanium source. X^-Ray diffraction(XRD) measurement proves that no impurity phase existed when the sample was heated at 900 ℃. Charge/discharge measurement was performed in a potential range of 0.01-2.5 V at different current-rates(C-rates). The initial charge/discharge capacities are 191/424 mA·h/g at 0.1 C and still remain as high as 101 mA·h/g after 50 cycles. CV test proves that the large irreversible capacity in the initial cycle results from the formation of the solid electrolyte interface(SEI). However, the electrode presents an increased initial coulombic efficiency in a 1 mol/L NaPF₆ electrolyte compared to that in a 1 mol/L NaClO₄ electrolyte.

关键词: Na₂Ti₃O₇, Sodium-ion battery, Anode, Hollow sphere TiO₂

Abstract:

Key words: Na₂Ti₃O₇, Sodium-ion battery, Anode, Hollow sphere TiO₂

XIE Man, WANG Kangkang, CHEN Renjie, LI Li, WU Feng. A Facile Route to Synthesize Sheet-like Na₂Ti₃O₇ with Improved Sodium Storage Properties[J]. 高等学校化学研究, 2015, 31(3): 443-446.

XIE Man, WANG Kangkang, CHEN Renjie, LI Li, WU Feng. A Facile Route to Synthesize Sheet-like Na₂Ti₃O₇ with Improved Sodium Storage Properties[J]. Chemical Research in Chinese Universities, 2015, 31(3): 443-446.

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A Facile Route to Synthesize Sheet-like Na₂Ti₃O₇ with Improved Sodium Storage Properties

A Facile Route to Synthesize Sheet-like Na₂Ti₃O₇ with Improved Sodium Storage Properties

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