激活碳和氧结合物用于使用过的离子电池阴极材料的低温热分解
Kang Liu1, Xiaohong Zhu2,3, Yuying Zhang1,3
1Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong 999077, China.
Environmental science & technology
|March 18, 2025
概括
研究人员开发了一种低温热解法,用于回收使用的离子电池 (LIB) 阴极材料. 这个过程激活了碳和氧键,大大减少了能源消耗和碳排放,从而实现了可持续的LIB回收利用.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 使用过的离子电池 (LIB) 带来了重大处理挑战.
- 目前用于LIB阴极材料的回收方法需要高温 (750-1400°C),导致高能耗和碳排放.
研究的目的:
- 开发一种低温热解法,用于回收使用的LIB阴极材料.
- 研究阴极材料中碳 (C) 和氧 (O) 键的同步激活.
主要方法:
- 使用的LiNi0.5Co0.2Mn0.3O2和石墨电极.
- 采用密度函数理论 (DFT) 建模来分析键激活和吸附能量.
- 研究了电荷转移和晶体相转换.
主要成果:
- 在较低的温度下实现了活性晶体的快速气化和热分解.
- 同步的C-O键激活使分解温度降低了200°C.
- DFT证实了C-O激活的显著更高的CO吸附能量 (-3.35 eV与-1.66 eV相比).
- 观察到增强的电子转移和电荷积累/消耗.
结论:
- 同步激活C和O键是一种可行的策略,用于退役的LIB阴极材料的低温热解回收.
- 这种方法为LIBs的低碳回收提供了潜在的途径.
- 这种方法减少了与LIB回收相关的能源消耗和环境影响.
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