TPDH-石墨烯作为锂离子电池新型负极材料:基于 DFT 的研究
TPDH-Graphene as a New Anodic Material for Lithium Ion Battery: DFT-Based Investigations
AI总结:
该研究利用 DFT 计算评估新型二维碳材料 TPDH-gr 的锂离子电池负极性能,揭示其适中的 Li 吸附、快速扩散、稳定嵌入与金属导电性,证明其应用潜力。
摘要:
通过密度泛函理论(DFT)计算,研究了近期提出的二维碳同素异形体——四-五-十-六方石墨烯(TPDH-gr)作为锂离子电池(LIB)负极材料的潜力。结果表明,Li 原子吸附强度适中(约 0.70 eV),易于脱附。此外,对能垒、扩散系数和开路电压(OCV)的计算显示,Li 原子在 TPDH-gr 表面扩散迅速,锂原子可稳定嵌入,并在 LIB 的充放电循环中表现出良好性能。这些发现结合 TPDH-gr 固有的金属特性,表明这种新型二维碳同素异形体是一种很有前景的 LIB 负极候选材料。
英文摘要:
The potential of tetra-penta-deca-hexagonal graphene (TPDH-gr), a recently proposed 2D carbon allotrope as an anodic material in lithium ion batteries (LIB), was investigated through density functional theory (DFT) calculations. The results indicate that Li-atom adsorption is moderate (around 0.70 eV), allowing for easy desorption. Moreover, energy barrier, diffusion coefficient, and open circuit voltage (OCV) calculations show rapid Li atom diffusion on the TPDH-gr surface, stable intercalation of lithium atoms, and good performance during the charge and discharge cycles of the LIB. These findings, combined with the intrinsic metallic nature of TPDH-gr, indicate that this new 2D carbon allotrope is a promising candidate for use as an anodic LIB material.
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