氢溴储能电池电极结构优化与电池效率研究
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- 英文论文题名：The Electrode Structure Optimization and the Battery Efficiency Study of the Hydrogen Bromine Energy Storage Battery
- 论文作者：史继诚 ; 张林松 ; 刘飒 ; 徐洪峰
- 英文论文作者：Jicheng Shi ; Linsong Zhang ; Sa Liu ; Hongfeng Xu ; College of Environmental and Chemical Engineering ; Dalian Jiaotong University ; Dalian Institute of Chemical Physics ; Chinese Academy of Sciences
- 年：2016
- 作者机构：大连交通大学环境与化学工程学院;中科院大连化学物理研究所;
- 论文关键词：氢溴电池 ; 电极结构 ; 能量效率
- 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：TM911.4
- 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：189k
- 原文格式：D
- 会议级别：全国
摘要
氢溴储能电池具有成本低、能量密度和能量效率高等突出优势,是目前最具竞争力的大规模储能技术之一。在氢溴电池运行过程中,充电过程产氢,氢离子运动方向由正极至负极,此过程会发生Nafion膜的酸渗透,而使负极铂催化剂失活,电池性能下降。本研究在氢溴电池负极侧,在碳纸扩散层上负载憎水催化层,利用氢气的吹扫排酸,从而保护负极铂催化剂的催化活性,在正极,利用碳毡的立体网络结构浸渍石墨粉,提高溴电极的电化学反应速度,通过改变电极结构,实现了氢溴电池允许充放电电流密度由100 mA cm~(-2)提高至200 mA cm~(-2);将电解液由0.5M HBr改变为3 M氢溴酸和5 M溴的混合溶液,氢溴电池的能量效率由电流密度200 mA cm~(-2)时的49.22%提高至81.77%;质子交换膜厚度由50μm降至20μm,恒流充放电电流密度200 mA cm~(-2),氢溴单电池前五次的平均能量效率由81.77%提高至85.26%,降低质子交换膜厚度,相应减少了膜电阻,能量效率得到提高。
In the charge process of the hydrogen bromine battery, the acid penetration is unavoidable along the hydrogen ions transfer process, as a result, the negative platinum catalyst is inactived and the battery performance is decreased. In this study, the hydrophobic catalyst layer is loaded on the carbon diffusion layer at the negative electrode; thus, the acid leaking from the positive electrode can be easily outflow from the negative electrode. By changing the electrode structure, the maximum charge and discharge current density is improved from 100 mA cm~(-2) to 200 mA cm~(-2). When the electrolyte is 3 M HBr and 5 M elemental bromine solution, the energy efficiency is 81.77% at the current density of 200 mA cm~(-2); as the proton exchange membrane thickness is 20 μm, the average energy efficiency is 85.26% in the first five charge and discharge cycles at the constant current of 200 mA cm~(-2).
In the charge process of the hydrogen bromine battery, the acid penetration is unavoidable along the hydrogen ions transfer process, as a result, the negative platinum catalyst is inactived and the battery performance is decreased. In this study, the hydrophobic catalyst layer is loaded on the carbon diffusion layer at the negative electrode; thus, the acid leaking from the positive electrode can be easily outflow from the negative electrode. By changing the electrode structure, the maximum charge and discharge current density is improved from 100 mA cm~(-2) to 200 mA cm~(-2). When the electrolyte is 3 M HBr and 5 M elemental bromine solution, the energy efficiency is 81.77% at the current density of 200 mA cm~(-2); as the proton exchange membrane thickness is 20 μm, the average energy efficiency is 85.26% in the first five charge and discharge cycles at the constant current of 200 mA cm~(-2).
引文
[1]Anna,I.;Nirala,S.;Ru-Fen,L.;Haley,K.;Jonas,B.;Trung,V.N.;Horia,M.;Eric,M.Langmuir.2013,29:480.
[2]William,A.B.;Martin,Z.B.;Cullen,R.B.Nature communications,2013,3346:1.
[2]William,A.B.;Martin,Z.B.;Cullen,R.B.Nature communications,2013,3346:1.
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