An inorganic-organic nanocomposite calix[4] quinone (C4Q)/CMK-3 as a cathode material for high-capacity sodium batteries
An inorganic-organic nanocomposite calix[4] quinone (C4Q)/CMK-3 as a cathode material for high-capacity sodium batteries
复制标题
无机-有机纳米复合材料杯[4]醌（C4Q）/CMK-3作为高容量钠电池正极材料
DOI：
10.1039/c7qi00453b
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Huang Weiwei
中科院分区：
文献类型：
--
作者：
Zheng Shibing;Hu Jinyan;Huang Weiwei
基于电网规模储能系统（ess）的概念，有机钠离子电池（OSIBs）结合了SIBs的优点和有机材料的优点，是新阶段商用电池的有希望的候选者。在锂离子电池中使用的杯状[4]醌（C4Q）有机正极材料具有422 mA h g−1的高初始放电容量。然而，它的钠储存性能仍不清楚。本文首次采用简单灌注法制备了C4Q/有序介孔碳（CMK-3）纳米复合材料，并将其作为可充电钠电池的正极材料。通过扫描电镜（SEM）、透射电镜（TEM）、x射线衍射（XRD）、BET分析等系统表征表明，当C4Q含量低于66%时，C4Q几乎完全注入CMK-3的纳米孔中。优化后的C4Q含量为33%的纳米复合材料在0.1C倍率下的初始放电容量高达438 mA h g−1，循环50次后的容量保持率为219.2 mA h g−1。CMK-3的纳米效应和良好的导电性是提高循环稳定性和高倍率性能的主要原因。这限制了包埋活性物质的溶解。我们的研究结果丰富了用于高容量钠电池的无机-有机纳米限制正极材料家族。
Based on the concept of grid-scale energy storage systems (ESSs), organic sodium-ion batteries (OSIBs), combining the merits of SIBs and the advantages of organic materials, are promising candidates for the new stage of commercial batteries. Organic cathode materials of calix[4]quinone (C4Q) in LIBs have delivered a high initial discharge capacity of 422 mA h g−1. However, its sodium storage property remains unclear. Here, a series of C4Q/ordered mesoporous carbon (CMK-3) nanocomposites have been firstly prepared by simple perfusion methods and employed as cathode materials for rechargeable sodium batteries. Systematic characterization including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) analysis has been carried out, which demonstrated that C4Q was almost completely infused in the nano-pores of CMK-3 when its content was lower than 66 wt%. The optimized nanocomposite with 33 wt% C4Q exhibits a superior initial discharge capacity up to 438 mA h g−1 at 0.1C rate and a capacity retention of 219.2 mA h g−1 after 50 cycles. The enhanced cycling stability and high-rate capability are attributed to the nanosize effect and the good conduction of CMK-3. This constrains the dissolution of the embedded active materials. Our results enrich the family of inorganic–organic nanoconfinement cathode materials for high capacity sodium batteries.