PROBLEMS OF CORROSION AND OTHER ELECTROCHEMICAL SIDE PROCESSES IN LITHIUM CHEMICAL POWER SOURCES WITH NONAQUEOUS ELECTROLYTES

被引:25
作者
SHEMBEL, EM [1 ]
APOSTOLOVA, RD [1 ]
STRIZHKO, AS [1 ]
BELOSOKHOV, AI [1 ]
NAUMENKO, AF [1 ]
ROZHKOV, VV [1 ]
机构
[1] CHEM CONCENTRATES PLANT,NOVOSIBIRSK 630038,RUSSIA
关键词
LITHIUM BATTERIES; CORROSION; ELECTROLYTES; ELECTRODES;
D O I
10.1016/0378-7753(94)02115-J
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The following electrochemical side processes were studied: (i) electrochemical corrosion processes in a short-circuited couple of active cathode material (FeS2)-current-collector material, and (ii) electrochemical and chemical decomposition of nonaqueous electrolytes proceeding in parallel with the base electrochemical reaction in power sources with a working discharge voltage of 1.5 V. The dynamics and direction of corrosion processes in the couple of FeS2-current collector depend on the potential difference between the active cathode substance and the current-collector material and on the overvoltage value of conjugated electrochemical processes. In the case of a Starting unreduced cathode, the reduction process takes place on pyrite and the oxidation process occurs on the current collector. After a partial cathode reduction the process direction changes. The rate of decomposition of the electrolyte in the potential range of 1.5 V is determined by its composition, the conditions of its. preparation and purification, and the cathode material used as catalyst in the process of the decomposition of the electrolyte.
引用
收藏
页码:421 / 424
页数:4
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