摘要
Currently, many organic materials are being considered as electrode materials and display good electrochemical behavior. However, the most critical issues related to the wide use of organic electrodes are their low thermal stability and poor cycling performance due to their high solubility in electrolytes. Focusing on one of the most conventional carboxylate organic materials, namely lithium terephthalate Li2CsH4O4, we tackle these typical disadvantages via modifying its molecular structure by cation substitution. CaCsH4O4 and A12(C8H4O4)3 are prepared via a facile cation exchange reaction. Of these, CaCsH4O4 presents the best cycling performance with thermal stability up to 570℃ and capacity of 399 mA.h.g-1, without any capacity decay in the voltage window of 0.005-3.0 V. The molecular, crystal structure, and morphology of CaCsH4O4 are retained during cycling. This cation-substitution strategy brings new perspectives in the synthesis of new materials as well as broadening the applications of organic materials in Li/Na-ion batteries.
当前,许多器官的材料正在被看作电极材料并且显示好电气化学的行为。然而,与器官的电极的宽使用有关的最关键的问题由于他们在电解质的高溶解度是他们的低热稳定性和差的骑车性能。集中于最常规的羧化物之一器官的材料,也就是锂 terephthalate 李<潜水艇class=“ a-plus-plus ”> 2 </sub > C <潜水艇class=“ a-plus-plus ”> 8 </sub > H <潜水艇class=“ a-plus-plus ”> 4 </sub > O <潜水艇class=“ a-plus-plus ”> 4 </sub>,我们经由修改它的分子的结构处理这些典型劣势由阳离子替换。 CaC <潜水艇class=“ a-plus-plus ”> 8 </sub > H <潜水艇class=“ a-plus-plus ”> 4 </sub > O <潜水艇class=“ a-plus-plus ”> 4 </sub>和艾尔<潜水艇class=“ a-plus-plus ”> 2 </sub>(C<sub class=“ a-plus-plus ”> 8 </sub > H <潜水艇class=“ a-plus-plus “> 4 </sub > O <潜水艇class=” a-plus-plus “> 4 </sub>)<sub class=” a-plus-plus “> 3 </sub>经由灵巧的阳离子交换反应被准备。这些, CaC < 潜水艇 class= “ a-plus-plus ” > 8 </sub > H < 潜水艇 class= “ a-plus-plus ” > 4 </sub > O < 潜水艇 class= “ a-plus-plus ” > 4 </sub> 与热稳定性介绍最好骑车的表演直到