Single Bath, Pulsed Electrodeposition of Copper-Tin Alloy Negative Electrodes for Lithium-ion Batteries

Abstract

Single-bath, pulsed electrodeposition of Cu-Sn alloy films was performed in a bath containing Lucent Technology’s SnTech plating solution and copper sulfate. Films with varying Cu-Sn stoichiometries were deposited. Deposited films were between ∼3 and 6 μm thick. These films were used as working electrodes in Li/Cu-Sn electrochemical cells to test their suitability as negative electrodes for Li-ion cells. As the Cu content in the film is increased, specific capacity is sacrificed for capacity retention. Films with a Cu-Sn atomic ratio of 0.27 (high Sn content) had a maximum specific capacity of 500 mAh/g, however capacity retention is only about 20% of the original capacity after 40 cycles. High Cu content films (Cu-Sn atomic ratio of 3.83) yield specific capacities near 200 mAh/g, with 80% capacity retention after 40 cycles. © 2003 The Electrochemical Society. All rights reserved.

All‐Solid‐State Lithium‐Ion Microbatteries: A Review of Various Three‐Dimensional Concepts

“…This is a common method to apply a metallic protective fi lm on industrial scale but it can also be applied at lab-scale for the production of various battery layers. It has been demonstrated that, for example, Cu 2 Sb, [ 193 ] V 2 O 5 , [ 194 ] MnO 2 , [ 195 ] MoS 2 [ 176 , 177 ] and metallic anodes like Bi, [ 196 ] Sn [ 197 ] and Cu-Sn alloys [ 198 ] can be deposited using electrodeposition.…”

Preparation of Co–Sn alloy film as negative electrode for lithium secondary batteries by pulse electrodeposition method

“…To easily and simply improve the cyclability of the Sn film electrode, we have selected a constant current pulse electrodeposition method because it is easy to accurately control the element content of the alloy [10] and obtain uniform and fine crystal grains [11]. Moreover, due to its high surface area and short ion diffusion length, it is well known that an electrode would show a good kinetic behavior.…”

A Transmission Electron Microscopy Study of Degradation Mechanisms in a Tin-Carbon Fibre Composite Anode for Rechargeable Lithium-Ion Batteries

“…In order to improve the cycling performance of Sn anodes, different strategies have been implemented to prevent the adverse effects of large volume changes. Among them, one strategy is to develop Sn-based intermetallic compounds such as Cu 6 Sn 5 (10)(11)(12), CoSn 3 (13) and Ni 3 Sn 4 (14)(15)(16), in which inactive elements compensate for the expansion/ contraction of Sn. The intermetallic anodes have a lower specific capacity than pure Sn, but their capacity retention is significantly higher.…”