Custom design of solid-solid phase change material with ultra-high thermal stability for battery thermal management

被引:119
作者
Xiao, Changren [1 ]
Zhang, Guoqing [1 ]
Li, Zhenghui [1 ]
Yang, Xiaoqing [1 ]
机构
[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China
基金
中国国家自然科学基金;
关键词
LI-ION BATTERY; SHAPE-STABILIZATION; ENERGY-STORAGE; COMPOSITE; PERFORMANCE; CONDUCTIVITY; GRAPHENE; SYSTEMS;
D O I
10.1039/d0ta05247g
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Despite being an advanced battery thermal management (BTM) strategy, the phase change material (PCM) cooling technology still suffers from the low thermal stability of the PCMs in practical applications, which leads to the leakage of the phase change ingredient, shape change or even collapse concerns under high temperature. Here we propose a creative idea for constructing a cross-linked polymeric structure with aliphatic side chains, namely, polymer PCM (PoPCM), through a facile one-step free-radical polymerization of octadecyl acrylate and crosslinkers. The aliphatic chains "tied up" on the cross-linked polymeric skeletonvia"chemical bonding" and provided a high latent heat of 98.8 J g(-1)without leakage, and therefore, delivered a stable solid-solid phase change behavior during long-term operation. The thermosetting 3-dimensional cross-linked structure simultaneously endowed the PoPCM with the anti-volume-expansion capability and excellent heat tolerance up to 250 degrees C without any deformation or leakage. When applied for BTM, the solid-solid PoPCM module demonstrated excellent and stable heat dissipation performance. The maximum temperature was 45.3 degrees C, and the temperature difference of the battery module could be controlled below 3.1 degrees C during the cyclic charge-discharge tests. Combining with the industrially available reagents and the simple preparation procedure at the kilogram level, we believe that this new strategy can present PCMs with superior feasibility for practical application in BTM.
引用
收藏
页码:14624 / 14633
页数:10
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