Abstract

Film structures composed of several identical modules [Co(x)/a-Si(100)/Cu(70)], where the x value varies from 2 to 10 nm, are investigated as an anode material for liquid lithium-ion batteries. It is shown that relatively thick cobalt layers are effective diffusion barriers for silicon and copper atoms, as well as for lithium ions. This leads to a decrease in the capacitance characteristics of the films under study. Thin cobalt layers (less than 3 nm) with a network structure, on the contrary, increase the capacitance characteristics of the anode films. This is caused by more uniform distribution of lithium ion drift channels that are formed at the initial stage of electrochemical cycling of electrodes over their volume.

中文翻译：

---

扩散势垒对Si-CuSi-Cu成分复合阳极电容性能的影响

摘要

作为液体锂离子电池的负极材料，研究了由几个相同的模块[Co（x）/ a -Si（100）/ Cu（70）]组成的膜结构，其中x值在2到10 nm之间变化。结果表明，相对较厚的钴层是硅和铜原子以及锂离子的有效扩散阻挡层。这导致所研究的膜的电容特性降低。相反，具有网络结构的薄钴层（小于3 nm）会增加阳极膜的电容特性。这是由于在电极的电化学循环初始阶段在其体积上形成的锂离子漂移通道分布更均匀而引起的。