不同正极活性物质的钛酸锂负极锂离子电池

Lithium titanate anode Li-ion battery with different cathode active materials

采用4种正极活性物质,设计32650型4.0 Ah钛酸锂（Li_4Ti_5O_（12））负极锂离子电池,评估充放电倍率性能、放电温升、低温放电性能、循环性能和安全性能。尖晶石镍锰酸锂（Li Ni0.5Mn1.5O4）正极电池的电压平台高（3.15 V）,-20℃下的1 C放电（3.3-2.0 V）容量是常温时的83.16%,比能量为74.57 Wh/kg;磷酸铁锂（LiFePO_4）正极电池的电压平稳（1.70 V）,适用于对电压要求严格的领域。三元材料正极电池中,镍钴锰酸锂（LiNi_（1/3）Co_（1/3）Mn_（1/3）O_2）正极电池的各项性能较优,3 C循环3 486次的容量保持率为102.58%,可用于快充领域;镍钴铝酸锂（LiNi_（0.8）Co_（0.15）Al_（0.05）O_2）正极电池更适合于储能领域。

Four kinds of cathode material were used to design 32650 type 4. 0 Ah lithium titanate （Li4TisOl2） anode Li-ion batteries. The charge-discharge rate capability, discharge temperature rise, low temperature discharge performance, cycle performance and safety performance were evaluated. Spinel LiNi0. 5 Mn,.5 04 cathode battery had a higher discharge voltage plateau （3.15 V）, which could retain 83. 16% of normal temperature discharge capacity when discharged at - 20 ℃ with 1 C in 3.3 - 2. 0 V, the specific energy was 74. 57 Wh/kg. Lithium iron phosphate（ LiFePO4 ） cathode battery had stable voltage（ 1.70 V） ,was suitable for the stable operating voltage field. Among the ternary cathode batteries, LiNil,3 Col/3 Mnl/3 02 cathode battery had better performance, which could maintain 102. 58% of initial discharge capacity when cycled with 3 C for 3 486 times,could be used in the field of fast charging, LiNi0. 8 Co0. 15 Al0. 05 02 cathode battery was more suitable in the field of energy storage.