A Novel Graphite-Graphite Dual Ion Battery Using an AlCl3-[EMIm]Cl Liquid Electrolyte
A Novel Graphite-Graphite Dual Ion Battery Using an AlCl3-[EMIm]Cl Liquid Electrolyte
复制标题
使用 AlCl3-[EMIm]Cl 液体电解质的新型石墨-石墨双离子电池
DOI：
10.1002/smll.201800745
复制
发表时间：
2018-07-12
期刊：
影响因子：
13.3
通讯作者：
Kang, Feiyu
中科院分区：
文献类型：
--
作者：
Li, Zhanyu;Liu, Jian;Kang, Feiyu
在此，开发了一种基于AlCl3/1-乙基-3-甲基咪唑Cl（[EMIm]Cl）室温离子液体电解质、使用导电石墨纸作为阴极和阳极材料的新型石墨-石墨双离子电池（GGDIB）。研究了GGDIB的工作原理，即金属铝在阳极表面沉积/溶解，氯铝酸根离子在阴极材料中嵌入/脱嵌。还分析了 GGDIB 的自放电现象和赝电容行为。由于离子液体的高离子电导率，GGDIB表现出优异的倍率性能和循环性能。在0.1~2.3 V电压窗口内，电流密度为200 mA g(-1)时，首次放电容量为76.5 mA h g(-1)，循环1000次后容量保持在62.3 mA h g(-1)，电流密度为500 mA g(-1)时容量保持率为98.42%。 GGDIB具有环境友好、成本低廉的优点，在未来的储能应用中具有很大的优势。
Herein, a novel graphite-graphite dual ion battery (GGDIB) based on a AlCl3/1-ethyl-3-methylimidazole Cl ([EMIm]Cl) room temperature ionic liquid electrolyte, using conductive graphite paper as cathode and anode material is developed. The working principle of the GGDIB is investigated, that is, metallic aluminum is deposited/dissolved on the surface of the anode, and chloroaluminate ions are intercalated/deintercalated in the cathode material. The self-discharge phenomenon and pseudocapacitive behavior of the GGDIB are also analyzed. The GGDIB shows excellent rate performance and cycle performance due to the high ionic conductivity of ionic liquids. The initial discharge capacity is 76.5 mA h g(-1) at a current density of 200 mA g(-1) over a voltage window of 0.1-2.3 V, and the capacity remains at 62.3 mA h g(-1) after 1000 cycles with a corresponding capacity retention of 98.42% at a current density of 500 mA g(-1). With the merits of environmental friendliness and low cost, the GGDIB has a great advantage in the future of energy storage application.