Enhancing lithium-ion batteries performance via electron-beam irradiation strategies: A case study of graphene aerogels loaded with SnO2 quantum dots
Enhancing lithium-ion batteries performance via electron-beam irradiation strategies: A case study of graphene aerogels loaded with SnO2 quantum dots
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通过电子束辐照策略增强锂离子电池性能：负载 SnO2 量子点的石墨烯气凝胶的案例研究
DOI：
10.1016/j.electacta.2018.06.028
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发表时间：
2018
影响因子：
6.6
通讯作者：
Zhao Bing
中科院分区：
文献类型：
--
作者：
Huang Shoushuang;Wang Wenfeng;Chen Dayong;Hu Zhangjun;Jiang Yong;Chen Zhiwen;Li Zhen;Pan Dengyu;Zhao Bing
探索微观结构演变和表面改性的通用策略在先进电极材料的发展中具有根本的重要性。在这项工作中，我们报告说，电子束照射是一种简单的方法来进行表面改性的交叉堆叠的石墨烯气凝胶负载SnO 2量子点，导致显着调制的锂存储性能。结果表明，经280 kGy辐照后的SnO 2/石墨烯气凝胶复合材料表现出优异的高可逆储锂容量、良好的倍率性能和循环稳定性，在0.1 C倍率下循环50次后，其放电容量仍保持在703 mAh g− 1。微观结构分析表明，石墨烯纳米片的剥离、非晶化程度的增加、无序度的增加、缺陷的增加以及表面部分含氧官能团的去除是其电化学性能增强的主要原因。本文提出的策略表明，电子束辐照是改善石墨烯基金属氧化物电化学性能的潜在策略。
Exploring versatile strategies for microstructural evolution and surface modification are of fundamental importance in the development of advanced electrode materials. In this work, we report that electron-beam irradiation is a facile approach to perform surface modification for the ultrathin cross-stacked graphene aerogels loaded with SnO2quantum dots, resulting in a remarkable modulation on the lithium storage performance. It is found that the as-synthesized SnO2/graphene aerogels composites irradiated at 280 kGy exhibit excellent high reversible lithium storage capacity, good rate capability and cycling stability, which retains a discharge capacity of 703 mAh g−1after 50 cycles at 0.1 C rate. Microstructure analysis indicates that the enhanced electrochemical properties are mainly attributed to the exfoliation of graphene nanosheets, the increase of amorphization, disorder, defects and the removal of partial oxygen-containing functional groups on the surface of graphene nanosheets. The strategy presented here demonstrates that the electron-beam irradiation is a potential strategy to improve the electrochemical performance of graphene-based metal oxides.