Theoretical study on electrochemical and thermal behavior of GNP incorporated anode materials for lithium-ion batteries

IF 8.9 2区 工程技术 Q1 ENERGY & FUELS Journal of energy storage Pub Date : 2024-11-28 DOI:10.1016/j.est.2024.114587
Geetha N. , D. Kavitha , Duraisamy Kumaresan , E. Venkata Ramana
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Abstract

In this paper, a theoretical investigation of the electrical and thermal performance of lithium-ion batteries employing an unexplored graphene nanoplatelets (GNP) incorporated lithium titanate (LTO-GNP) anode and lithium manganese oxide cathode is demonstrated by using the COMSOL Multiphysics modeling and simulation. The GNP proportions in the LTO active material matrix are varied from 0 to 3 wt%, to assess the improvements in cell potential, state of charge (SOC), variation in internal temperature, discharging capacity, and battery power density across four selected electrodes. The simulation results have indicated the positive effects of increasing the anode’s GNP concentration on the battery performance, alongside temperature-dependent open-circuit voltage (OCV) and SOC outputs of the battery. The analysis of the effects of thermal conductivity on heat accumulation and dissipation within the battery has indicated that the anode with 3 wt% of GNP consistently performed superior to the other electrodes by providing uniform temperature distribution and enhanced electrical performance by promoting better discharge capacity and power density. The LTO anode with 3 wt% GNP has shown 0.2V more cell potential and also has 12.5% improved thermal conductivity when compared to LTO anode without GNP, contributing to better heat distribution inside the battery. The simulation also emphasized the importance of optimal GNP loading in the Li-ion battery anode to attain more uniform temperature distribution with improved battery health and efficiency.

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锂离子电池 GNP 负极材料的电化学和热行为理论研究
本文利用 COMSOL 多物理场建模和仿真技术,对钛酸锂(LTO-GNP)正极和锰氧化锂负极中未开发的石墨烯纳米片(GNP)的电学和热学性能进行了理论研究。LTO 活性材料基体中的 GNP 比例从 0% 到 3% 不等,以评估四个选定电极在电池电位、充电状态 (SOC)、内部温度变化、放电容量和电池功率密度方面的改进。模拟结果表明,提高阳极的 GNP 浓度对电池性能有积极影响,同时电池的开路电压(OCV)和 SOC 输出也与温度有关。热传导率对电池内部热量积累和散失的影响分析表明,GNP 含量为 3 wt% 的阳极的性能始终优于其他电极,它能提供均匀的温度分布,并通过提高放电容量和功率密度来增强电性能。与不含 GNP 的 LTO 阳极相比,含 3 wt% GNP 的 LTO 阳极的电池电位提高了 0.2V,热传导率提高了 12.5%,从而改善了电池内部的热分布。该模拟还强调了在锂离子电池阳极中添加最佳 GNP 的重要性,以实现更均匀的温度分布,提高电池的健康状况和效率。
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来源期刊
Journal of energy storage
Journal of energy storage Energy-Renewable Energy, Sustainability and the Environment
CiteScore
11.80
自引率
24.50%
发文量
2262
审稿时长
69 days
期刊介绍: Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.
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