纳米MnO锂离子电池负极材料的制备与性能

引用本文: 丁朋, 徐友龙, 孙孝飞. 纳米MnO锂离子电池负极材料的制备与性能[J]. 物理化学学报, 2013, 29(02): 293-297. doi: 10.3866/PKU.WHXB201211142 shu

Citation: DING Peng, XU You-Long, SUN Xiao-Fei. Synthesis and Performance of Nano MnO as an Anode Material for Lithium-Ion Batteries[J]. Acta Physico-Chimica Sinica, 2013, 29(02): 293-297. doi: 10.3866/PKU.WHXB201211142 shu

纳米MnO锂离子电池负极材料的制备与性能

摘要:

以高锰酸钾和抗坏血酸合成的MnC₂O₄·2H₂O为前驱体, 通过固相烧结制备了纳米MnO材料. 分别采用X射线衍射(XRD)、扫描电子显微镜(SEM)和恒电流充放电技术考察了其晶相结构、颗粒形貌和电化学性能.分析结果表明, 该纳米MnO具有面心立方的岩盐结构, 结晶度良好. 其颗粒是由粒径为50-100 nm的一次颗粒结合而成的二次颗粒, 大小约为400-600 nm. 当充放电电流密度为46.3 mA·g^-1时, 纳米MnO的首次库仑效率可达68.9%, 可逆比容量为679.7 mAh·g^-1. 在141.1 mA·g^-1的电流密度下循环50圈后, 比容量由584.5mAh·g^-1降至581.5 mAh·g^-1, 容量保持率高达99.5%, 表现出优异的循环性能. 此外, 当电流密度增加到494.7 mA·g^-1 (~2C)时, 其比容量依然可达290 mAh·g^-1, 表现出较好的倍率性能和快速充放电能力. 因此, 纳米MnO具有比容量高、循环稳定、倍率性能好和安全环保等优点,是一种非常有前景的锂离子电池负极材料.

关键词:

English

Synthesis and Performance of Nano MnO as an Anode Material for Lithium-Ion Batteries

1.
1 Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi’an 710049, P. R. China;
2 International Center for Dielectric Research, Xi'an Jiaotong University, Xi’an 71004
9. P. R. China;
3 Department of Power, Wuhan Ordnance Non-Commissioned Officer Academy, Wuhan 430075, P. R. China
Received Date: 10 September 2012
Available Online: 14 January 2013

Abstract:

Transition metal oxides, especially manganese monoxide (MnO), are being intensively studied as candidate anode materials for next generation lithium-ion batteries in high efficiency energy storage applications such as portable electronics, electric vehicles, and stationary electricity storage. In this paper, the MnC₂O₄·2H₂O precursor, prepared fromKMnO4 and ascorbic acid, was heat-treated to synthesize nano MnO by a solid-state reaction approach. X-ray diffraction (XRD) showed that the so-obtained MnO had a rock-salt structure with od crystallinity, and scanning electron microscopy (SEM) indicated that the primary particle size was about 50-100 nm, while the secondary particle size was about 400-600 nm. As an active material for lithium-ion batteries, the nano MnO material delivered a reversible capacity of 679.7 mAh·g^-1 with an initial columbic efficiency of 68.9% at a current density of 46.3 mA·g^-1. The specific discharge capacity slightly decreased from 584.5 to 581.5 mAh·g^-1 with a retention of 99.5% after 50 cycles at a current density of 141.1 mA·g^-1. Moreover, the material was able to release a capacity of 290 mAh·g^-1 at current densities as high as 494.7 mA·g^-1 (corresponding to ~2C), which demonstrates reasonable rate performance and moderately fast charge/discharge capabilities. All of the above characteristics make nano MnO promising anode materials for developing high-capacity, long-life, low-cost, and environmentally-friendly lithium-ion batteries.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

纳米MnO锂离子电池负极材料的制备与性能

English

Synthesis and Performance of Nano MnO as an Anode Material for Lithium-Ion Batteries

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

纳米MnO锂离子电池负极材料的制备与性能

English

Synthesis and Performance of Nano MnO as an Anode Material for Lithium-Ion Batteries

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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