对新型2H二化作为Li/K离子电池的阳极材料的计算研究
Muhammad Isa Khan1, Iqra Mehmood1, Saleh S Alarfaji2
1Department of Physics, The Islamia University of Bahawalpur Rahim Yar Khan Campus Bahawalpur Pakistan muhammad.isa@iub.edu.pk iqraamehmoodch30@gmail.com m.junaid@iub.edu.pk.
RSC advances
|October 31, 2024
概括
化 (CrTe2) 显示出作为离子和离子电池的稳定阳极材料的前景. 它独特的结构提供了高存储容量和出色的Li / K吸附,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
- 计算化学计算化学
背景情况:
- 开发高容量阳极材料对于推进金属离子电池技术至关重要.
- 化 (CrTe2) 的2H相是一种具有电池应用潜力的分层材料.
研究的目的:
- 研究2H-CrTe2作为离子 (Li-ion) 和离子 (K-ion) 电池的阳极材料的适用性.
- 通过密度函数理论 (DFT) 评估2H-CrTe2的热力学,结构,机械和电子性能.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 分析包括吸附能量,结构稳定性,机械性能,电子结构和扩散障碍.
- 计算了理论容量和开放电路电压 (OCV).
主要成果:
- 2H-CrTe2表现出极好的热力学,结构和机械稳定性.
- 显著负的吸附能量 (-3.7 eV为Li, -4.63 eV为K) 表明稳定的离子吸附,并防止集群.
- 理论上的存储容量达到1395mAhg-1的和1134mAhg-1的K.
- 计算的OCV为离子的0.20V和K离子的0.13V.
- 电导率和金属特性随着离子度的增加而保持不变.
结论:
- 2H-CrTe2是下一代离子和K离子电池的一个有前途的新型阳极材料.
- 它的固有稳定性和高存储容量使其适用于苛刻的电池应用.
- DFT计算为实验验证和进一步开发提供了坚实的基础.
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