CAJ | 학술논문

　　采用化学还原法制备链状Co?P(4.9%P)合金粉末。将Co?P粉末与锗粉以不同质量比进行机械混合，形成Co?P复合电极。采用充放电测试和交流阻抗法研究锗对Co?P粉末电化学性能的影响。结果表明，加入锗粉后，复合电极的电化学性能显著提高。当Co?P合金粉与锗粉质量比为5：1时，电极的可逆放电容量为350.3 mA·h/g，经50次循环后，容量保留率为95.9%。从循环伏安曲线可看出，Co?P复合电极主要发生Co/Co(OH)2转化。EIS测试表明，混合电极(Co?P合金粉与锗粉质量比为5：1)的电荷转移电阻很低，表明锗的添加有助于促进Co氧化成Co(OH)2反应的进行。
　　채용화학환원법제비련상Co?P(4.9%P)합금분말。장Co?P분말여타분이불동질량비진행궤계혼합，형성Co?P복합전겁。채용충방전측시화교류조항법연구타대Co?P분말전화학성능적영향。결과표명，가입타분후，복합전겁적전화학성능현저제고。당Co?P합금분여타분질량비위5：1시，전겁적가역방전용량위350.3 mA·h/g，경50차순배후，용량보류솔위95.9%。종순배복안곡선가간출，Co?P복합전겁주요발생Co/Co(OH)2전화。EIS측시표명，혼합전겁(Co?P합금분여타분질량비위5：1)적전하전이전조흔저，표명타적첨가유조우촉진Co양화성Co(OH)2반응적진행。
Co?P (4.9%P) powders with a chain-like morphology were prepared by a novel chemical reduction method. The Co?P and germanium powders were mixed at various mass ratios to form Co?P composite electrodes. Charge and discharge test and electrochemical impedance spectroscopy (EIS) were carried out to investigate the electrochemical performance, which can be significantly improved by the addition of germanium. For instance, when the mass ratio of Co?P powders to germanium is 5:1, the sample electrode shows a reversible discharge capacity of 350.3 mA·h/g and a high capacity retention rate of 95.9%after 50 cycles. The results of cyclic voltammmetry (CV) show the reaction mechanism of Co/Co(OH)2 within Co?P composite electrodes and EIS indicates that this electrode shows a low charge-transfer resistance, facilitating the oxidation of Co to Co(OH)2.