摘要
以氧化处理的碳纤维刷(Carbon fibre brush,CFB)作阴极材料,提出海水超级电容溶解氧电池(Seawaterbattery with electrochemical capacitance,SWB-EC)概念,并制造了3台实海测试样机.分别由循环伏安和稳态恒流放电方法研究了氧化处理前后的CFB和镁合金牺牲阳极的放电性能.结果表明:氧化处理的CFB具有准电容特性,在动态海水中其氧阴极还原反应(Oxygen reduction reaction,ORR)活性比未处理的CFB有大幅度提高;镁合金牺牲阳极的开路电位为-1.74 V,工作电位高,溶解较均匀.用以上阴、阳极材料制成3台样机作连续实海放电测试,经运行2个月,相关实验数据分析表明,与商品化海水电池SWB1200初步相比,该海水超级电容溶解氧电池具有更高的体积比功率密度.
A new concept of seawater battery with electrochemical capacitance （SWB-EC） has been proposed using carbon fibre brush （CFB） as the cathode material, and three testing prototypes have been made accordingly. The discharge performances of the CFB before- and after-oxidation and Mg alloy sacrifice anode were studied by cyclic vohammetry and constant current discharge tests under steady state conditions. Results show that the oxidized CFB exhibits the pseudo-capacitive characteristic and its activity of oxygen reduction reaction （ORR） in stirred seawater highly increases, comparing with the non-oxidized CFB. The open circuit potential of Mg alloy sacrifice anode is - 1.74 V, having the advantages of high working potential and uniform dissolution. The consec- utive marine discharge test is conducted for prototypes made of the oxidized CFB cathode and Mg alloy sacrifice anode. The preliminary data collected in two months reveals that comparing with the commercial seawater battery SWB1200 ,the home-made SWB-EC achieves a higher volume specific power density.
出处
《电化学》
CAS
CSCD
北大核心
2012年第1期24-30,共7页
Journal of Electrochemistry
基金
山东省博士基金(No.BS2011NJ019)
中央高校基本科研业务费专项资金(No.201022006)资助
关键词
溶解氧
氧还原反应
碳纤维
镁合金
海水电池
准电容
dissolved oxygen
oxygen reduction reaction
carbon fibre
Mg alloy
seawater battery
pseudocapacitance
