采用干湿结合回收技术回收了废旧锌锰干电池中的锰,讨论了硝酸浓度对碳酸锰回收率的影响。将得到的碳酸锰作为锰源,采用溶胶凝胶法制备了三元正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2。通过沉积法使氢氧化铝胶体沉积在材料表面对三元正...采用干湿结合回收技术回收了废旧锌锰干电池中的锰,讨论了硝酸浓度对碳酸锰回收率的影响。将得到的碳酸锰作为锰源,采用溶胶凝胶法制备了三元正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2。通过沉积法使氢氧化铝胶体沉积在材料表面对三元正极材料进行表面包覆改性。而且对所得产品进行了XRD、TEM表征和电化学性能检测。结果表明,少量包覆不会改变材料的层状结构,材料首次放电比容量达到152 m A·h/g,且提高了循环性能,循环充放电100次后,放电比容量为117.3 m A·h/g。展开更多
Studies on recycling cathodic active materials of wastent Zn Mn batteries in hydrochloric acid and sulfuric acid have been carried out to determine the effect of several parameters on the dissolution ratio (DR) of sam...Studies on recycling cathodic active materials of wastent Zn Mn batteries in hydrochloric acid and sulfuric acid have been carried out to determine the effect of several parameters on the dissolution ratio (DR) of sample,including temperature,time,Fe powder,acid/sample artio,H 2O 2,HCl and H 2SO 4 concentration.Results show that H 2O 2 and Fe powder have apparent effect on DR and only a suitable amount of H 2O 2 or Fe powder can lead to maximum DR value,that the optimum conditions in HCl are:the initial concentration of HCl,2mol/L;the HCl/sample ratio,10;the dissolution time,60 minutes;the dissolution temperature,40℃ and the initial concentration of H 2O 2,3wt.%,and that the optimum ones in H 2SO 4 are different.展开更多
文摘采用干湿结合回收技术回收了废旧锌锰干电池中的锰,讨论了硝酸浓度对碳酸锰回收率的影响。将得到的碳酸锰作为锰源,采用溶胶凝胶法制备了三元正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2。通过沉积法使氢氧化铝胶体沉积在材料表面对三元正极材料进行表面包覆改性。而且对所得产品进行了XRD、TEM表征和电化学性能检测。结果表明,少量包覆不会改变材料的层状结构,材料首次放电比容量达到152 m A·h/g,且提高了循环性能,循环充放电100次后,放电比容量为117.3 m A·h/g。
文摘Studies on recycling cathodic active materials of wastent Zn Mn batteries in hydrochloric acid and sulfuric acid have been carried out to determine the effect of several parameters on the dissolution ratio (DR) of sample,including temperature,time,Fe powder,acid/sample artio,H 2O 2,HCl and H 2SO 4 concentration.Results show that H 2O 2 and Fe powder have apparent effect on DR and only a suitable amount of H 2O 2 or Fe powder can lead to maximum DR value,that the optimum conditions in HCl are:the initial concentration of HCl,2mol/L;the HCl/sample ratio,10;the dissolution time,60 minutes;the dissolution temperature,40℃ and the initial concentration of H 2O 2,3wt.%,and that the optimum ones in H 2SO 4 are different.
