Center for Energy Convergence Research, Korea Institute of Science and Technology , Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.
Department of Material Science and Engineering, Korea University , Anam dong 5 ga, Seongbuk-gu, Seoul 02841, Republic of Korea.
ACS Appl Mater Interfaces. 2016 Aug 3;8(30):19514-23. doi: 10.1021/acsami.6b05973. Epub 2016 Jul 20.
The hybrid composite electrode comprising CuO and Cu2O micronanoparticles in a highly graphitized porous C matrix (CuO/Cu2O-GPC) has a rational design and is a favorable approach to increasing the rate capability and reversible capacity of metal oxide negative materials for Li- and Na-ion batteries. CuO/Cu2O-GPC is synthesized through a Cu-based metal-organic framework via a one-step thermal transformation process. The electrochemical performances of the CuO/Cu2O-GPC negative electrode in Li- and Na-ion batteries are systematically studied and exhibit excellent capacities of 887.3 mAh g(-1) at 60 mA g(-1) after 200 cycles in a Li-ion battery and 302.9 mAh g(-1) at 50 mA g(-1) after 200 cycles in a Na-ion battery. The high electrochemical stability was obtained via the rational strategy, mainly owing to the synergy effect of the CuO and Cu2O micronanoparticles and highly graphitized porous C formed by catalytic graphitization of Cu nanoparticles. Owing to the simple one-step thermal transformation process and resulting high electrochemical performance, CuO/Cu2O-GPC is one of the prospective negative active materials for rechargeable Li- and Na-ion batteries.
包含氧化铜和氧化亚铜微米纳米粒子的高度石墨化多孔 C 基质（CuO/Cu2O-GPC）的混合复合电极具有合理的设计，是提高金属氧化物负极材料在锂离子和钠离子电池中倍率性能和可逆容量的一种有利方法。CuO/Cu2O-GPC 通过一步热转化过程从基于 Cu 的金属有机骨架合成。系统研究了 CuO/Cu2O-GPC 负极在锂离子和钠离子电池中的电化学性能，在锂离子电池中以 60 mA g(-1) 的电流密度循环 200 次后，其容量可达到 887.3 mAh g(-1)，在钠离子电池中以 50 mA g(-1) 的电流密度循环 200 次后，其容量可达到 302.9 mAh g(-1)。通过合理的策略获得了高电化学稳定性，这主要归因于 CuO 和 Cu2O 微米纳米粒子以及由 Cu 纳米粒子催化石墨化形成的高度石墨化多孔 C 的协同效应。由于采用了简单的一步热转化工艺，且具有较高的电化学性能，CuO/Cu2O-GPC 是一种有前途的可充电锂离子和钠离子电池负极活性材料。
