AI Article Synopsis
- The LiNiMnO (LNMO) cathode material is promising for high-energy batteries but struggles with poor performance due to oxidative reactions and manganese dissolution when exposed to liquid electrolytes.
- Researchers developed a LiInCl-coated LNMO (LIC@LNMO) using the sol-gel method to create a protective layer that reduces contact with the liquid electrolyte.
- The LIC@LNMO showed impressive results, with a 99% Coulombic efficiency and 80% capacity retention after 230 cycles at room temperature, indicating improved electrochemical performance.
Article Abstract
The high-voltage spinel LiNiMnO (LNMO) cathode material with high energy density, low cost, and excellent rate capability has grabbed the attention of the field. However, a high-voltage platform at 4.7 V causes severe oxidative side reactions when in contact with the organic electrolyte, leading to poor electrochemical performance. Furthermore, the contact between the liquid electrolyte and LNMO leads to Mn dissolution during cycles. In this work, we applied the sol-gel method to prepare LiInCl-coated LNMO (LIC@LNMO) to address the mentioned problems of LNMO. By introducing a protective layer of halide-type solid-state electrolyte on LNMO, we can prevent direct contact between LNMO and electrolyte while maintaining good ionic conductivity. Thus, we could demonstrate that 5 wt % LIC@LNMO exhibited a good cycle performance with a Coulombic efficiency of 99% and a capacity retention of 80% after the 230th cycle at the 230th cycle at 1C at room temperature.
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| http://dx.doi.org/10.1021/acsami.3c08517 | DOI Listing |
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