减少再堆叠改性的石墨烯薄膜在锂离子电池中的应用

引用本文: 杨晓伟, 何雨石, 廖小珍, 马紫峰. 减少再堆叠改性的石墨烯薄膜在锂离子电池中的应用[J]. 物理化学学报, 2011, 27(11): 2583-2586. doi: 10.3866/PKU.WHXB20111123 shu

Citation: YANG Xiao-Wei, HE Yu-Shi, LIAO Xiao-Zhen, MA Zi-Feng. Improved Graphene Film by Reducing Restacking for Lithium Ion Battery Applications[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2583-2586. doi: 10.3866/PKU.WHXB20111123 shu

减少再堆叠改性的石墨烯薄膜在锂离子电池中的应用

基金项目:
国家重点基础研究发展规划项目(2007CB209705) (2007CB209705)

国家自然科学基金(21006063, 21073120) (21006063, 21073120)

上海市科委科技攻关计划(10DZ1202702)资助 (10DZ1202702)

摘要: 对溶剂化的石墨烯薄膜进行冷冻干燥处理得到改性的石墨烯薄膜, 这种处理可以降低干燥过程中石墨烯片层之间严重的再堆叠. 结果表明改性的石墨烯薄膜具有更多的折皱和更大的层间距, 并提高了电化学性能. 在电流密度为50 mA·g^-1时, 该电池首次循环的放电和充电比容量分别为1189.3和645.2 mAh·g^-1, 400次循环后充电比容量仍然超过305 mAh·g^-1, 显著高于使用传统真空过滤得到的石墨烯薄膜的电化学性能. 此外, 相对于传统的石墨电极(包括活性物质、聚合物粘结剂和导电集流体), 石墨烯薄膜电极的质量和成本有明显的下降.

关键词:

English

Improved Graphene Film by Reducing Restacking for Lithium Ion Battery Applications

1.
Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
Received Date: 01 July 2011
Available Online: 27 October 2011
Fund Project:
国家重点基础研究发展规划项目(2007CB209705)

国家自然科学基金(21006063, 21073120)

上海市科委科技攻关计划(10DZ1202702)资助

Abstract: We prepared improved graphene films by freeze drying solvated graphene films, which greatly reduced the serious restacking of graphene layers when they were face-to-face stacked. The results show that the improved graphene film had more corrugations and a larger interplanar distance than the usual graphene films prepared by vacuum filtration leading to improved electrochemical performance. The discharge and charge capacities of the battery were 1189.3 and 645.2 mAh·g^-1, respectively, for the first cycle at 50 mA·g^-1 and the charge capacity remained above 305 mAh·g^-1 after 400 cycles. These values are higher than those of the graphene film prepared by vacuum filtration. Moreover, the mass and cost of the electrode were reduced significantly compared with the commercial graphite-based anode, which is made by coating a mixture of an active material, a polymeric binder, and an electric current collector.

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

减少再堆叠改性的石墨烯薄膜在锂离子电池中的应用

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Improved Graphene Film by Reducing Restacking for Lithium Ion Battery Applications

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

减少再堆叠改性的石墨烯薄膜在锂离子电池中的应用

English

Improved Graphene Film by Reducing Restacking for Lithium Ion Battery Applications

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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