掺钇球形Ni(OH)_2的合成及高温性能研究

Synthesis and high-temperature charge/discharge performanceof the Y^(3+)-doped spherical Ni(OH)_2

通过络合沉淀的方法制得了含钇的球形Ni(OH) 2 ,研究了掺杂Y3 + 后的球形Ni(OH) 2 在不同温度下的充放电性能。试验结果表明 :常温下含钇的球形Ni(OH) 2 的放电比容量比普通球形Ni(OH) 2 稍低 ,但随着温度的升高 ,它的放电比容量要比普通球形Ni(OH) 2 高很多 ,一般在 2 5%以上。掺杂钇提高了球形Ni(OH) 2

The Y^(3+)-doped spherical Ni(OH)_2 active material was synthesized using chemical coordination precipitations. The specific capacity of the Y^(3+)-doped spherical Ni(OH)_2 was measured at different temperatures. The specific capacity of the Y^(3+)-doped spherical Ni(OH)_2 was slightly lower than that of the common spherical Ni(OH)_2 at room temperature. However,the measured specific capacity of Y^(3+)-doped Ni(OH)_2 was much higher than that of the common spherical Ni(OH)_2 at higher temperature. Doped spherical Ni(OH)_2 with Y^(3+) improved the high-temperature performance of spherical Ni(OH)_2.