LiNi1-xCoxO2 cathode materials for lithium ion batteries were synthesized by the co-precipitation and solid-state reaction methods with LiOH·H2O, Ni(NO3)2·6H2O and Co(NO3)2·6H2O as raw materials. The ma...LiNi1-xCoxO2 cathode materials for lithium ion batteries were synthesized by the co-precipitation and solid-state reaction methods with LiOH·H2O, Ni(NO3)2·6H2O and Co(NO3)2·6H2O as raw materials. The materials were characterized by XRD, SEM and electrochemical tests. The results showed that synthesized cathode materials were with layered structure similar to α-NaFeO2 and uniform morphology and nearly normal grain size distribution and better electrochemical performance when x was 0.18. The first charge and discharge capacity of the cathode material was 224.3 mAh·g-1 and 194.2 mAh·g-1, respectively. 88.5% of the first discharge capacity remained at the 20th cycle.展开更多
采用共沉淀方法合成出具有较高活性的前驱氢氧化物,经预处理后再用高温固相法合成L iaN i0.6Co0.4O2(1<a<1.05)正极材料,其结晶良好,结构发育较完善.样品经XRD,SEM和充放电性能测试说明层状结构稳定,首次放电容量为156.0 mA h.g-1...采用共沉淀方法合成出具有较高活性的前驱氢氧化物,经预处理后再用高温固相法合成L iaN i0.6Co0.4O2(1<a<1.05)正极材料,其结晶良好,结构发育较完善.样品经XRD,SEM和充放电性能测试说明层状结构稳定,首次放电容量为156.0 mA h.g-1,充放电40次后仍有146.0 mA h.g-1,放电容量损失仅为6.4%.展开更多
文摘LiNi1-xCoxO2 cathode materials for lithium ion batteries were synthesized by the co-precipitation and solid-state reaction methods with LiOH·H2O, Ni(NO3)2·6H2O and Co(NO3)2·6H2O as raw materials. The materials were characterized by XRD, SEM and electrochemical tests. The results showed that synthesized cathode materials were with layered structure similar to α-NaFeO2 and uniform morphology and nearly normal grain size distribution and better electrochemical performance when x was 0.18. The first charge and discharge capacity of the cathode material was 224.3 mAh·g-1 and 194.2 mAh·g-1, respectively. 88.5% of the first discharge capacity remained at the 20th cycle.
文摘采用共沉淀方法合成出具有较高活性的前驱氢氧化物,经预处理后再用高温固相法合成L iaN i0.6Co0.4O2(1<a<1.05)正极材料,其结晶良好,结构发育较完善.样品经XRD,SEM和充放电性能测试说明层状结构稳定,首次放电容量为156.0 mA h.g-1,充放电40次后仍有146.0 mA h.g-1,放电容量损失仅为6.4%.
