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Rapid, tunable synthesis of porous carbon xerogels with expanded graphite and their application as anodes for Li-ion batteries.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-16 , DOI: 10.1016/j.jcis.2020.01.048 Ling Chen 1 , Junqian Deng 2 , Shu Hong 1 , Hailan Lian 1
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-16 , DOI: 10.1016/j.jcis.2020.01.048 Ling Chen 1 , Junqian Deng 2 , Shu Hong 1 , Hailan Lian 1
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The present work reports a rapid, tunable synthesis of resorcinol-formaldehyde (RF) carbon xerogels and their potential application as anode materials for lithium-ion battery. An iron-containing deep eutectic solvent (DES) is applied as both reaction medium and catalyst for the polymerization and graphitization. Water at different levels is employed as a co-solvent to mediate the polymerization and phase separation processes to produce a more-developed porous structure. The established binary-solvent synthesis strategy greatly simplifies the RF carbon xerogel preparation processes with a very short sol-gel time and a more acceptable ambient pressure drying. A duplex carbon configuration of rich microporosity (SBET = 566 m2 g-1) and expanded nanographite is achieved in the binary-solvent system with a DES mass fraction of 70%. The integrated structural merit is highly favorable for lithium storage, showing a reversible capacity of 633 mA h g-1 at 0.1 A g-1 and an excellent rate performance (205 mA h g-1 at 5 A g-1) as well as superior cycling stability.
中文翻译：
具有膨胀石墨的多孔碳干凝胶的快速，可调谐合成及其在锂离子电池阳极中的应用。
本工作报道了间苯二酚-甲醛（RF）碳干凝胶的快速，可调谐合成及其作为锂离子电池负极材料的潜在应用。含铁的深共熔溶剂（DES）既用作反应介质又用作聚合和石墨化的催化剂。使用不同含量的水作为助溶剂来介导聚合和相分离过程，以产生更发达的多孔结构。既定的二元溶剂合成策略以非常短的溶胶-凝胶时间和更可接受的环境压力干燥极大地简化了RF碳干凝胶的制备过程。在二元溶剂系统中，DES的质量分数为70％，可以实现具有丰富的微孔率（SBET = 566 m2 g-1）和膨胀的纳米石墨的双碳结构。
更新日期：2020-01-16
中文翻译：
具有膨胀石墨的多孔碳干凝胶的快速，可调谐合成及其在锂离子电池阳极中的应用。
本工作报道了间苯二酚-甲醛（RF）碳干凝胶的快速，可调谐合成及其作为锂离子电池负极材料的潜在应用。含铁的深共熔溶剂（DES）既用作反应介质又用作聚合和石墨化的催化剂。使用不同含量的水作为助溶剂来介导聚合和相分离过程，以产生更发达的多孔结构。既定的二元溶剂合成策略以非常短的溶胶-凝胶时间和更可接受的环境压力干燥极大地简化了RF碳干凝胶的制备过程。在二元溶剂系统中，DES的质量分数为70％，可以实现具有丰富的微孔率（SBET = 566 m2 g-1）和膨胀的纳米石墨的双碳结构。
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