以整体式炭为电极电解制备复合电极材料的研究
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- 英文论文题名：In situ preparation of electrode materials on monolithic carbon by electrolysis
- 论文作者：何斌 ; 李文翠 ; 杨超 ; 王思琼 ; 陆安慧
- 英文论文作者：Bin He ; Wen-Cui Li ; Chao Yang ; Si-Qiong Wang ; An-Hui Lu ; State Key Laboratory of Fine Chemicals ; Dalian University of Technology
- 年：2016
- 作者机构：大连理工大学化工学院精细化工国家重点实验室;
- 论文关键词：整体式炭 ; 电解法 ; 微孔炭片 ; 高电化学活性
- 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-第二十九分会：电化学材料
- 语种：中文
- 分类号：TQ127.11;O646.54
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 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：177k
- 原文格式：D
- 会议级别：全国
摘要
自支撑整体式炭具有导电性好、孔道贯通、骨架连续的特点,以整体式炭为电极基体,电解含有活性物质离子的电解液,可将活性物质填装到多孔炭中,制备含炭复合电极材料。该方法形成的活性物质被限制在炭的微孔中,减小了颗粒尺寸,且活性物质与炭接触紧密,提高了活性物质的导电性。同时,这种活性物质具有"电化学记忆效应",表现出高的反应活性。例如通过电解含有多硫化钠的电解液,制备出含硫量为70%的硫炭复合物,并将其用作锂硫电池正极材料。电池性能测试结果显示制备的硫炭电极材料表现出高的比容量和倍率性能以及优异的倍率性能,明显优于传统熔融方法制备的硫炭电极材料。
We have developed an electrolysis approach that allows effective and uniform incorporation of active materials inside the micropores of carbon nanosheets for advanced electrode materials. A sulfur-carbon hybrid with a 70 wt % sulfur loading was prepared using this method, in which no nonconductive sulfur agglomerations are formed. Because the incorporated sulfur is electrically connected to the carbon matrix in nature, the hybrid cathode shows excellent electrochemical performance, including a high reversible capacity, good rate capability, and good cycling stability, as compared to one prepared using the popular melt-diffusion method.
We have developed an electrolysis approach that allows effective and uniform incorporation of active materials inside the micropores of carbon nanosheets for advanced electrode materials. A sulfur-carbon hybrid with a 70 wt % sulfur loading was prepared using this method, in which no nonconductive sulfur agglomerations are formed. Because the incorporated sulfur is electrically connected to the carbon matrix in nature, the hybrid cathode shows excellent electrochemical performance, including a high reversible capacity, good rate capability, and good cycling stability, as compared to one prepared using the popular melt-diffusion method.
引文
[1]Li,D.;Han,F.;Wang,S.;Cheng,F.;Sun,Q.;Li,W.-C.ACS Appl.Mater.Interfaces 2013,5:2208.
[2]Ji,X.;Lee,K.T.;Nazar,L.F.Nat.Mater.2009,8:500.
[2]Ji,X.;Lee,K.T.;Nazar,L.F.Nat.Mater.2009,8:500.