丰富的Li[Ni Mn Co1- ]O2 单晶作为离子电池的高级快速充电阴极
Vivekanantha Murugan1, Hoon-Hee Ryu1, Guoying Chen1
1Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
概括
单晶 (SC) 阴极增强了离子电池 (LIB). 更小的SC (<1μm) 通过减少梯度来提高快速充电 (FC) 性能,从而实现先进的电池设计.
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
- 电池技术 电池技术
背景情况:
- 单晶 (SC) ,,,氧化 (NMC) 阴极对于高能离子电池 (LIB) 是至关重要的.
- 粒子裂变是使用SC阴极的快充 (FC) -LIBs的主要故障模式.
研究的目的:
- 为了评估SC NMC阴极在快速充电条件下的性能.
- 调查SC的组成,大小和形状如何影响FC性能和故障机制.
主要方法:
- 富含的SC-NMC样本的合成,具有不同的特性.
- 在快充 (FC) 条件下的SC阴极性能的研究.
- 分析颗粒级度梯度和表面表面工程.
主要成果:
- 较小的SCs (<1μm) 对FC-LIBs至关重要,因为较大的SCs (>2μm) 呈现出显著的度梯度.
- 暴露特定的晶体面,如 (104),可以增强的运输,并最大限度地减少副作用.
- 一个优化的SC-LiNi0.80Mn0.05Co0.15O2阴极在6C充电后150个循环后实现了165mAh/g.
结论:
- 在快速充电离子电池应用中,SC-NMC阴极显著有前途.
- 优化SC尺寸和表面方面是减轻粒子裂变和改善循环寿命的关键.
- 这项研究为设计下一代高性能FC-LIB的先进阴极提供了关键的见解.
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