Ti-Doped,Mn-Based Polyanionic Compounds of Na4Fe1.2Mn1.8(PO4) 2P2O7用于离子电池阴极的电池电池
Hualin Li1, Gang Pang1, Weilong Zhang1
1School of Materials Science and Engineering, Key Laboratory of Efficient Conversion and Solid-State Storage of Hydrogen & Electricity of Anhui Province, Anhui University of Technology, Ma'anshan 243002, China.
Nanomaterials (Basel, Switzerland)
|April 25, 2025
概括
这项研究提高了使用和联合兴奋剂的离子电池电极. 新材料Na4Fe1.2Mn1.7Ti0.1(PO4)2P2O7显示了更好的电压,容量和稳定性,以提高电池性能.
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:
- 离子电池 (SIB) 是有前途的,因为的丰富性和低成本.
- Na4Fe3(PO4)2P2O7 (NFPP) 是一个稳定的SIB电极材料,但其工作电压和容量较低.
- 提高NFPP的电化学性能对于其商业可行性至关重要.
研究的目的:
- 为了改善SIBs的NFPP的操作电压和电化学性能.
- 通过多元元素兴奋剂来增强循环耐用性和速率性能.
主要方法:
- 合成配合的Na4Fe3(PO4)2P2O7 (NFPP) 来增加工作电压.
- 进一步使用进行兴奋剂,以提高循环耐用性和速率性能.
- 半细胞和全细胞共物材料 (Na4Fe1.2Mn1.7Ti0.1(PO4)2P2O7) 的电化学表征.
主要成果:
- /联合合材料的高工作电压为3.6V,相比Na+/Na.
- 在0.1°C时达到122.9mAhg-1的可逆容量,在0.5°C100个循环后保持90.6%.
- 用硬碳阳极进行全电池测试显示,50个周期的初始容量为101.7 mAh g-1和86.9%的保留率.
结论:
- 最佳的Mn/Ti联合剂有效地提高了NFPP材料的电化学行为.
- 兴奋剂减轻了Jahn-Teller效应和溶解,增强了结构稳定性.
- 这一策略显著提高了SIBs的NFPP电极的循环性能.
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