Preparation of re-constructed carbon nanosheet powders and their efficient lithium-ion storage mechanism
Preparation of re-constructed carbon nanosheet powders and their efficient lithium-ion storage mechanism
复制标题
重构碳纳米片粉末的制备及其高效锂离子存储机制
DOI：
10.1016/j.electacta.2015.06.060
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发表时间：
2015-08
影响因子：
6.6
通讯作者：
Junmin Nan
中科院分区：
文献类型：
--
作者：
Xin Xiao;Yanhui Sun;Ronghua Zeng;Junmin Nan
基于碳纳米材料的重构思想，制备了具有独特微观结构和比原型石墨粉末更高锂离子储存容量的新型折叠重构碳纳米片（re-CNSs）。首先通过石墨的连续化学氧化和超声破碎操作制备纳米级碳碎片悬浮液，然后通过喷雾干燥和随后的高温还原过程获得re-CNS粉末。所制备的re-CNSs表现出宽度为几微米的折叠外观，对于在500 °C下热还原的re-CNSs样品（re-CNSs 500），最大初始比容量为903 mAh g-1。在100次循环后，re-CNSs 500的可逆容量保持在约400 mAh g-1。丰富的羧基和氢氧化物基团，边缘，和有缺陷的网站的个别氧化石墨片段促进位错形成的re-CNSs。此外，位错机制，因此被用来描述增强的锂离子存储。
Based on the re-construction idea of carbon nanomaterials, novel folding re-constructed carbon nanosheets (re-CNSs) with unique microstructure and higher lithium-ion storage capacity than prototype graphite powders are prepared. The nanoscale carbon-fragment suspension is firstly prepared through a successive chemical oxidation of graphite and ultrasonic crushing operation, and the re-CNS powders are then obtained by spray drying the suspension and a subsequent high-temperature reducing process. The as-prepared re-CNSs exhibit a folding appearance with a width of several micrometers, with a maximum initial specific capacity of 903 mAh g−1for the re-CNSs sample thermally reduced at 500 °C (re-CNSs500). After 100 cycles, the reversible capacity is maintained at about 400 mAh g−1for the re-CNSs500. The abundant carboxylic and hydroxide groups, edges, and defective sites of individual graphite oxide fragments facilitate the dislocation formation in the re-CNSs. In addition, a dislocation mechanism is thus used to describe the enhanced lithium-ion storage.
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影响因子：
10.9
作者：
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通讯作者：
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影响因子：
29.4
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通讯作者：
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影响因子：
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作者：
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