FeCl_3作为Li-O_2电池电解液添加剂的电化学性能探究
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- 英文论文题名：FeCI_3 as an eletrolyte additive for efficient lithium-O_2 batteries
- 论文作者：蔡森荣 ; 林晓东 ; 郑明森 ; 董全峰
- 英文论文作者：Senrong Cai ; Xiaodong Lin ; Mingsen Zheng ; Quanfeng Dong ; Department College of Chem.& Chem.Engin. ; Xiamen Univ.
- 年：2016
- 作者机构：厦门大学化学化工学院化学系;
- 论文关键词：Li-O_2电池 ; 液相催化剂 ; FeCl_3
- 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-第三十分会：化学电源
- 语种：中文
- 分类号：TM911.41;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 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：223k
- 原文格式：D
- 会议级别：全国
摘要
Li-O_2电池的理论比容量高达11430Wh·kg,成为了研究的热点。但是,Li-O_2电池阴极反应的动力学十分缓慢,导致放电和充电过程的过电位较大。大量的催化剂已经被提出用来降低反应的过电位,比如:贵金属,金属氧化物,碳材料等~(1-2)。与传统的固体催化剂相比,液相催化剂可以克服固-固催化接触面积小、导电性差的缺点,从而大幅度降低过电位,提高电池的性能。这里,我们探究FeCl_3作为Li-O_2电池电解液添加剂的电化学性能。加入FeCl_3后能够明显降低充电过程的过电位,提高电池的能量效率。对比添加LiCl的电池,我们可以把OER电位的降低归结于Fe~(3+)的作用。同时该电池循环性能得到改善,经过65圈的循环,充电平台电位的衰减也不明显。
Rechargeable Li-O_2 batteries have attracted considerable attention owing to its extremly high theorical capacities.However,Large overpotentials during discharge and charge processes,resulting from sluggish kinetics of the battery reation,lead to poor energy efficiency.Studies have focused on solid catalysts to reduce the overpotential.But the poor kinetics during charge process results from the reduced contact between the insulating Li_2O_2 particles and solid catalysts.Therefore,soluble catalysts have become focal points.Herein,we demonstrate a electrolyte additive of FeCl_3 for efficiency Li-O_2 batteires.The overpotential during charging could be substantially decrease.As a result,the round-trip efficiency and cycleing perfoamance of Li-O_2 batteires were improved significantly.
Rechargeable Li-O_2 batteries have attracted considerable attention owing to its extremly high theorical capacities.However,Large overpotentials during discharge and charge processes,resulting from sluggish kinetics of the battery reation,lead to poor energy efficiency.Studies have focused on solid catalysts to reduce the overpotential.But the poor kinetics during charge process results from the reduced contact between the insulating Li_2O_2 particles and solid catalysts.Therefore,soluble catalysts have become focal points.Herein,we demonstrate a electrolyte additive of FeCl_3 for efficiency Li-O_2 batteires.The overpotential during charging could be substantially decrease.As a result,the round-trip efficiency and cycleing perfoamance of Li-O_2 batteires were improved significantly.
引文
[1]Cao,Y.;Zheng,M.;Cai,S.;Lin,X.J.Mater.Chem.A.2014,2:18736
[2]Jian,Z.;Liu,P.;Li,F.;He,P.Angew.Chem.2014,53:442
[2]Jian,Z.;Liu,P.;Li,F.;He,P.Angew.Chem.2014,53:442