Sub-2 nm Thick Fluoroalkylsilane Self-Assembled Monolayer-Coated High Voltage Spinel Crystals as Promising Cathode Materials for Lithium Ion Batteries
| Autor: | Nobuyuki Zettsu, Shuhei Uchida, Katsuya Teshima, Satoru Kida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Multidisciplinary
Materials science Spinel Self-assembled monolayer 02 engineering and technology Electrolyte engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode Article 0104 chemical sciences law.invention Ion Coating Chemical engineering law Monolayer engineering 0210 nano-technology Dissolution |
| Zdroj: | Scientific Reports |
| ISSN: | 2045-2322 |
| Popis: | We demonstrate herein that an ultra-thin fluoroalkylsilane self-assembled monolayer coating can be used as a modifying agent at LiNi0.5Mn1.5O4−δcathode/electrolyte interfaces in 5V-class lithium-ion batteries. Bare LiNi0.5Mn1.5O4−δ cathode showed substantial capacity fading, with capacity dropping to 79% of the original capacity after 100 cycles at a rate of 1C, which was entirely due to dissolution of Mn3+ from the spinel lattice via oxidative decomposition of the organic electrolyte. Capacity retention was improved to 97% on coating ultra-thin FAS17-SAM onto the LiNi0.5Mn1.5O4 cathode surface. Such surface protection with highly ordered fluoroalkyl chains insulated the cathode from direct contact with the organic electrolyte and led to increased tolerance to HF. |
| Databáze: | OpenAIRE |
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