中文摘要：

以Ni（CH3COO）2·4H2O和Mn（CH3COO）2·4H2O为原料，分别在400、500℃分解3、7h得到镍锰复合氧化物前驱体，再与锂源Li2CO3混匀，在800℃煅烧12h，600℃退火24h得到LiNi0.5Mn1．5O4正极材料。XRD、SEM、EIS和恒流充放电测试结果表明，在400℃、7h制备的前驱体与Li2CO3合成的LiNi0.5Mn1．5O4性能最佳。室温下以0．1C倍率充放电，首次放电比容量达到141．5mAh／g，循环30次后容量保持率为98．55％；以1C倍率充放电，首次放电比容量为120．34mAh／g，循环30次后放电比容量为112．09mAh／g。

英文摘要：

LiNi0.5Mn1.5O4 cathode materials were synthesized by solid state method using Ni （CH3 COO）2 · 4H20,Mn（CH3COO）2 · 4H2O as starting materials, then decomposed to get nickel manganese oxides at 400 and 500℃ for 3 or 7h,joined and mixed the source of lithium Li2CO3. The sample was calcined in air at 800℃ for 12h and then annealed at 600℃ for 24h. XRD, SEM, EIS and charge-discharge performance tests showed that LiNi0.5Mn1.5O4 delivered the best electrochemical performance by used precursor made at 400℃ for 7h. Its initial specific discharge capacity was 141.5mAh/g when 0.1C charge-discharge at room temperature,and after 30 cycles the capacity retention was 98.59%;when charged-discharged at 1C initial capacity was 120.34mAh/g, and after 30 cycles the capacity was 112.09mAh/g.