Ren Longlong, Wang Linhui, Qin Yufeng, Li Qiang
College of Mechanical and Electronic Engineering, Shandong Agricultural University, Taian 271018, China.
College of Information Science and Engineering, Shandong Agricultural University, Taian 271018, China.
Micromachines (Basel). 2022 Jan 19;13(2):149. doi: 10.3390/mi13020149.
Cobalt oxides have been intensely explored as anodes of lithium-ion batteries to resolve the intrinsic disadvantages of low electrical conductivity and volume change. However, as a precursor of preparing cobalt oxides, Co(OH) has rarely been investigated as the anode material of lithium-ion batteries, perhaps because of the complexity of hydroxides. Hybridized Co(OH) nanomaterial structures were synthesized by the water bath method and exhibited high electrochemical performance. The initial discharge and charge capacities were 1703.2 and 1262.9 mAh/g at 200 mA/g, respectively. The reversible capacity was 1050 mAh/g after 150 cycles. The reversible capability was 1015 mAh/g at 800 mA/g and increased to 1630 mAh/g when driven back to 100 mA/g. The electrochemical reaction kinetics study shows that the lithium-ion diffusion-controlled contribution is dominant in the energy storage mechanism. The superior electrochemical performance could result from the water bath method and the hybridization of nanosheets and nanoparticles structures. These hybridized Co(OH) nanomaterial structures with high electrochemical performance are promising anodes for lithium-ion batteries.
钴氧化物作为锂离子电池的负极材料已被深入研究，以解决其固有缺点，即低电导率和体积变化。然而，作为制备钴氧化物的前驱体，Co(OH)作为锂离子电池的负极材料却很少被研究，这可能是因为氢氧化物的复杂性。通过水浴法合成了杂化的Co(OH)纳米材料结构，并表现出高电化学性能。在200 mA/g时，首次放电和充电容量分别为1703.2和1262.9 mAh/g。150次循环后可逆容量为1050 mAh/g。在800 mA/g时可逆容量为1015 mAh/g，当电流回到100 mA/g时增加到1630 mAh/g。电化学反应动力学研究表明，锂离子扩散控制的贡献在储能机制中占主导地位。优异的电化学性能可能源于水浴法以及纳米片和纳米颗粒结构的杂化。这些具有高电化学性能的杂化Co(OH)纳米材料结构有望成为锂离子电池的负极材料。
