通过调整轨道杂交,提高丰富的基阴极的初始库伦比效率
Tao Zeng1, Ziqin Jiao1, Xiaoyu Gao1
1School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China.
Angewandte Chemie (International ed. in English)
|May 6, 2025
概括
氧治疗改善了离子电池的丰富的基氧化物 (LRMO). 这种方法提高了初始库伦比克效率 (ICE) 和特定容量,为商业化铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 丰富的基氧化物 (LRMO) 为离子电池提供高容量和低成本.
- 商业化受到低初始库伦比克效率 (ICE) 和氧气释放的阻碍.
- 了解过渡金属-氧轨道杂交是提高LRMO性能的关键.
研究的目的:
- 为了研究氧治疗对LRMO阴极材料的影响.
- 为了调节过渡金属 (TM) 3d和氧 (O) 2p轨道之间的杂交.
- 为了提高LRMO的初始coulombic效率 (ICE) 和电化学性能.
主要方法:
- 用于丰富的基氧化物 (LRMO) 的glyoxal治疗.
- 对过渡金属 (TM) 3d和氧 (O) 2p轨道杂交的分析.
- 电化学测试用于评估初始库伦比克效率 (ICE),特定容量和容量保留.
主要成果:
- 格里奥萨尔治疗减少了Co/Mn t2g-O 2p杂交,并激活了Co2+/Co3+氧化还原作用.
- LRMO的ICE显著改善,从85.3%提高到102.5%.
- 在0.1°C的温度下达到291.2mAhg-1的高特异性容量,并增强容量保留.
结论:
- 调TM 3d-O 2p轨道杂交是一种改善LRMO性能的可行策略.
- 格里奥克萨尔治疗有效地提高了LRMO阴极的ICE和特异性容量.
- 这些发现支持处理后的LRMO在先进的离子电池应用中的潜力.
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