Sun Daming, Wang Xiaojie, Qu Meizhen
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences (CAS), No. 9, 4th Section of South Renmin Road, Chengdu 610041, China.
School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
Materials (Basel). 2022 Jul 5;15(13):4705. doi: 10.3390/ma15134705.
Rechargeable lithium-ion batteries (LIBs) are known to be practical and cost-effective devices for storing electric energy. LIBs have a low energy density, which calls for the development of new anode materials. The Prussian blue analog (PBA) is identified as being a candidate electrode material due to its facile synthesis, open framework structures, high specific surface areas, tunable composition, designable topologies and rich redox couples. However, its poor electrical conductivity and mechanical properties are the main factors limiting its use. The present study loaded PBA (Co[Fe(CN)]·10HO) on graphene oxide (Co-Fe-PBA@rGO) and then conducted calcination at 300 °C under the protection of nitrogen, which reduced the crystal water and provided more ion diffusion pathways. As a result, Co-Fe-PBA@rGO showed excellent performance when utilized as an anode in LIBs, and its specific capacities were 546.3 and 333.2 mAh g at 0.1 and 1.0 A g, respectively. In addition, the electrode also showed excellent performance in the long-term cycle, and its capacity reached up to 909.7 mAh g at 0.1 A g following 100 cycles.
众所周知，可充电锂离子电池（LIBs）是用于存储电能的实用且具有成本效益的装置。锂离子电池能量密度低，这就需要开发新的负极材料。普鲁士蓝类似物（PBA）因其合成简便、开放框架结构、高比表面积、可调节组成、可设计拓扑结构和丰富的氧化还原对而被确定为候选电极材料。然而，其较差的导电性和机械性能是限制其应用的主要因素。本研究将PBA（Co[Fe(CN)]·10HO）负载在氧化石墨烯上（Co-Fe-PBA@rGO），然后在氮气保护下于300℃进行煅烧，这减少了结晶水并提供了更多的离子扩散途径。结果，Co-Fe-PBA@rGO在用作锂离子电池的负极时表现出优异的性能，其在0.1和1.0 A g时的比容量分别为546.3和333.2 mAh g。此外，该电极在长期循环中也表现出优异的性能，在0.1 A g下经过100次循环后，其容量达到909.7 mAh g。
