CAJ | 학술논문

采用改进的高温固相法合成了阴阳离子复合掺杂改性的锂离子电池尖晶石结构正极材料LiMn1.98Cr0.02O4-yCly(y=0,0.01,0.02,0.03,0.04,0.05,0.10).采用X射线衍射手段对材料的晶体结构进行了表征.从材料的晶体结构、充放电容量、循环性能和倍率放电特性等方面分析了复合掺杂在稳定晶体结构和改善材料电化学性能方面的作用.实验结果表明,由于复合掺杂的综合作用,改性后的材料既保持了高的初始容量,又具有优良的循环性能,倍率放电性能也得到了有效的改善.其中LiMn1.98Cr0.02O3.96Cl0.04的综合性能最优,初始放电比容量达到127 mA·h/g以上,循环50次后仍有110 mA·h/g的放电比容量.
채용개진적고온고상법합성료음양리자복합참잡개성적리리자전지첨정석결구정겁재료LiMn1.98Cr0.02O4-yCly(y=0,0.01,0.02,0.03,0.04,0.05,0.10).채용X사선연사수단대재료적정체결구진행료표정.종재료적정체결구、충방전용량、순배성능화배솔방전특성등방면분석료복합참잡재은정정체결구화개선재료전화학성능방면적작용.실험결과표명,유우복합참잡적종합작용,개성후적재료기보지료고적초시용량,우구유우량적순배성능,배솔방전성능야득도료유효적개선.기중LiMn1.98Cr0.02O3.96Cl0.04적종합성능최우,초시방전비용량체도127 mA·h/g이상,순배50차후잉유110 mA·h/g적방전비용량.