商业化碳分子筛作为高性能钠离子电池负极材料
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- 英文论文题名：Commercial Carbon Molecular Sieves as a High Performance Anode for Sodium-Ion Batteries
- 论文作者：张思伟 ; 吕伟 ; 罗冲 ; 康飞宇 ; 杨全红
- 英文论文作者：Siwei Zhang ; Wei Lv ; Chong Luo ; Feiyu Kang ; Quan-Hong Yang ; Shenzhen Key Engineering Laboratory for Functionalized Carbon Materials ; Graduate School at Shenzhen ; Tsinghua University ; School of Chemical Engineering and Technology ; Tianjin University
- 年：2016
- 作者机构：清华大学深圳研究生院碳功能材料工程实验室;天津大学化工学院;
- 论文关键词：碳分子筛 ; 钠离子电池 ; 负极材料 ; 极微孔
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十二分会：能源纳米材料物理化学
- 语种：中文
- 分类号：TM912
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十二分会 ; 能源纳米材料物理化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：501k
- 原文格式：D
- 会议级别：全国
摘要
本论文表明商业化的碳分子筛(Carbon Molecular Sieves,CMS)作为钠离子电池负极材料展现出卓越的储钠能力:首圈库仑效率为73.2%,在100 mA/g的电流密度下比容量约为297 mAh/g,(如图1)是目前报道过的商业化材料中储钠能力最强的碳材料,甚至比大部分经过实验室复杂条件合成的硬碳材料都要强。这样优异的电化学性能主要是因为碳分子筛具有大量的极微孔(孔径范围为0.3-0.6 nm),电极材料中这样小的孔只允许钠离子嵌入而阻止了电解液分子进入,从而降低了电解液和活性物质的接触面积,减少了SEI膜的形成及其他副反应的发生,提高了电池首圈的库仑效率。这样优异的电化学性能及工业化的碳分子筛电极材料,基本符合商业化电池的要求,此项发明将极大的推进钠离子电池的商业化进程,也提供了一种可行的钠离子电池负极材料结构~([1])。
A commercial carbon molecular sieve(CMS) demonstrates excellent Na ion storage performance and is the best among current commercially available materials and much better than most hard carbons reported with complex microstructures. With a very low specific surface area measured by N_2 adsorption, the CMS shows a high reversible capacity of 297 mAh/g at a relatively high current density of 100 mA/g, and, more promising, a very high initial Coulombic efficiency of up to 73.2%, which is the highest among unmodified commercial carbons. Such good performance is mainly the result of its abundant ultra-small(0.3-0.6 nm) pores that only allow the insertion of Na ions while rejecting the electrolyte, thus preventing its contact with the carbon surface, which is a basic principle for the design of a high performance anode material for a sodium-ion battery(SIB).
A commercial carbon molecular sieve(CMS) demonstrates excellent Na ion storage performance and is the best among current commercially available materials and much better than most hard carbons reported with complex microstructures. With a very low specific surface area measured by N_2 adsorption, the CMS shows a high reversible capacity of 297 mAh/g at a relatively high current density of 100 mA/g, and, more promising, a very high initial Coulombic efficiency of up to 73.2%, which is the highest among unmodified commercial carbons. Such good performance is mainly the result of its abundant ultra-small(0.3-0.6 nm) pores that only allow the insertion of Na ions while rejecting the electrolyte, thus preventing its contact with the carbon surface, which is a basic principle for the design of a high performance anode material for a sodium-ion battery(SIB).
引文
[1]Zhang S.W.,Lv W.,Kang F.Y.,Yang Q.H.Energy Storage Mater,2016,3:18.