红外碳硫分析仪测定NixCoyMn1-x-y（OH）2中的硫酸根含量

Determination of sulfate in NixCoyMn1-x-y(OH)2 by infrared absorption carbon-sulfur analyzer

摘要:

介绍了采用红外碳硫分析仪测定锂离子电池正极材料NixCoyMn1- x-y （OH）2中硫酸根含量的方法，对电阻炉的炉温和保温时间对测定结果的影响进行了实验，并对红外碳硫仪测定结果的精密度进行了分析．结果表明，在550℃的电阻炉，保温30 min的条件下对试样进行预处理，消除干扰测定结果的OH -后再用红外碳硫分析仪测定NixCoyMn1- x- y（OH）2中硫酸根的含量，测试结果的相对标准偏差RSD≤1．18，．本法与硫酸钡重量法的测试结果吻合．

Abstract:

The experiment is performed using infrared absorption carbon-sulfur analyzer to determine the sulfate in the NixCoyMn1 - x- y (OH)2 and the temperature of resistance furnace and holding time affecting the determination results are investigated .The precision of the determination results for infrared absorp-tion carbon-sulfur analyzer is analyzed .The results indicated that the RSD is equal to or less than 1 .18， when the sample is pre-treated at 550 ℃ for 30min in resistance furnace ,eliminating the influence of OH -on the determination results first ,then using infrared absorption carbon-sulfur analyzer to determine the sulfate in the NixCoyMn1 - x- y (OH)2 .The determination results using this method is the same as using barium sulfate weight method .