新的铁酸盐作为3.5V级离子电池的阴极材料
Shin-ichi Nishimura1, Megumi Nakamura, Ryuichi Natsui
1Department of Chemical System Engineering, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Journal of the American Chemical Society
|September 14, 2010
概括
一种新的铁酸盐,Li(2) FeP(2) O(7),证明了离子电池有前途的电化学性能. 这种材料为大规模应用提供了当前商业阴极的潜在替代品.
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
- 无机化学 无机化学 有机化学
背景情况:
- 开发先进的阴极材料对于提高离子电池性能至关重要.
- 奥利文铁酸盐 (LiFePO4) 由于其安全性和成本效益,是大型应用的基准阴极材料.
- 探索新的酸盐化合物为具有潜在改进性能的新型电极材料提供了机会.
研究的目的:
- 为了合成和表征一种新的酸盐化合物,铁酸盐 (Li(2) FeP(2) O(7)).
- 为了评估Li(2)FeP(2)O(7) 作为离子电池的阴极材料的电化学性能.
- 评估其作为现有商业阴极材料 (如LiFePO4.4) 的竞争对手的潜力.
主要方法:
- 固态反应合成用于Li(2)FeP(2)O(7) 制剂.
- 使用适当的晶体学技术来确定晶体结构.
- 电化学测试,以评估可逆电极的运行和容量.
主要成果:
- 成功合成并确定了Li(2) FeP(2) O(7) 的晶体结构.
- 在大约3.5V与Li的可逆电极运行证明.
- 实现了110 mAh的特定容量g(-1),与其理论上的一个电子值保持一致,即使在没有特殊处理的情况下,对于微米大小的粒子也是如此.
结论:
- 2FeP2O7是离子电池的一个有前途的新阴极材料.
- 它的性能表明它可能是商业橄酸 LiFePO4.4 的竞争性替代品.
- 这种化合物及其衍生品为未来的电池电极研究提供了一个新的平台.
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