Filippin Alejandro N, Lin Tzu-Ying, Rawlence Michael, Zünd Tanja, Kravchyk Kostiantyn, Sastre-Pellicer Jordi, Haass Stefan G, Wäckerlin Aneliia, Kovalenko Maksym V, Buecheler Stephan
Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129, CH-8600 Dübendorf Switzerland
Laboratory of Inorganic Chemistry, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland.
RSC Adv. 2018 Jun 4;8(36):20304-20313. doi: 10.1039/c8ra02461h. eCollection 2018 May 30.
To obtain full advantage of state-of-the-art solid-state lithium-based batteries, produced by sequential deposition of high voltage cathodes and promising oxide-based electrolytes, the current collector must withstand high temperatures (>600 °C) in oxygen atmosphere. This imposes severe restrictions on the choice of materials for the first layer, usually the cathode current collector. It not only must be electrochemically stable at high voltage, but also remain conductive upon deposition and annealing of the subsequent layers without presenting a strong diffusion of its constituent elements into the cathode. A novel cathode current collector based on a Ni-Al-Cr superalloy with target composition NiAlCr is presented here. The suitability of this superalloy as a high voltage current collector was verified by determining its electrochemical stability at high voltage by crystallizing and cycling of LiCoO directly onto it.
为了充分利用通过顺序沉积高压阴极和有前景的氧化物基电解质生产的最先进的固态锂基电池，集流体必须在氧气气氛中承受高温（>600°C）。这对第一层材料（通常是阴极集流体）的选择施加了严格限制。它不仅必须在高压下具有电化学稳定性，而且在后续层沉积和退火时仍保持导电性，同时其组成元素不会强烈扩散到阴极中。本文介绍了一种基于目标成分NiAlCr的镍铝铬高温合金的新型阴极集流体。通过直接在其上结晶和循环LiCoO来确定其在高压下的电化学稳定性，从而验证了这种高温合金作为高压集流体的适用性。
