摘要
采用线性扫描伏安法和电位阶跃法,研究了锂离子在铝电极上的电极过程机理.结果表明锂离子在铝电极上沉积形成α固熔体时,电极过程受锂原子向铝电极中的扩散速度控制.当形成β锂铝合金时,存在成核极化现象,成核过程为瞬间成核过程,初期电极过程受形成β锂铝合金的速度控制,一定时间后受锂原子通过β锂铝合金层的扩散速度控制.β锂铝合金阳极有极限充电电压和极限电流.
The Deposition mechanism of Lithium on aluminium electrode was studied by using linear sweep voltammetry and potential step method. The formation of α-solid solution was controlled by the diffusion of lithium within the aluminium substance. The formation of β-LiAl alloy was limited by the rate of forming the alloy at the legining, and by diffiusion of lithium through the β- LiAl alloy layer was limited by the rate of forming the alloy at the begining, and by the diffusion of lithium through the β-LiAl alloy later. Neucleation polarization for the formation of β-LiAl alloy was observed. This polarization is an instantaneaus process. There are a Limiting charging patential and a charging current for the LiAl alloy anode.
出处
《电化学》
CAS
CSCD
1998年第2期205-209,共5页
Journal of Electrochemistry
基金
国家自然科学基金
关键词
锂铝合金阳极
熔盐锂电池
电极过程
铝电极
Lithiumaluminium alloy anode, potential step method, malten salt Lithium battery