A free-standing Li1.2Mn0.54Ni0.13Co0.13O2/MWCNT framework for high-energy lithium-ion batteries†,Inorganic Chemistry Frontiers

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A free-standing Li1.2Mn0.54Ni0.13Co0.13O2/MWCNT framework for high-energy lithium-ion batteries†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-10-05 00:00:00 , DOI: 10.1039/c8qi00926k
Congjie Lv _{1,

2,

3,

4} , Yi Peng _{1,

2,

3,

4} , Jing Yang _{1,

2,

3,

4} , Chen Liu _{1,

2,

3,

4} , Xiaochuan Duan _{1,

2,

3,

4} , Jianmin Ma _{4,

5,

6,

7} , Taihong Wang _{1,

2,

3,

4}

Affiliation

Free-standing Li_1.2Mn_0.54Ni_0.13Co_0.13O₂/MWCNT (LLO/MWCNT) framework electrodes have been successfully fabricated for high energy density lithium-ion batteries. By constructing a 3D conductive network, the LLO/MWCNT cells exhibit superior electrochemical performances. Specifically, LLO/MWCNT cells achieve a high initial discharge capacity of 318.2 mA h g⁻¹ at 0.1 C (1 C = 250 mA g⁻¹) with a coulombic efficiency of 91.1%. After 200 cycles at 1 C, LLO/MWCNT cells can still deliver 209.2 mA h g⁻¹, corresponding to a capacity retention of 95.9%. Furthermore, LLO/MWCNT electrodes can still deliver a high discharge capacity of 121.6 mA h g⁻¹ after 500 cycles at 10 C. Compared with conventional electrodes, the free-standing LLO/MWCNT electrodes can yield up to 47% reduction in the total weight and the active materials of LLO/MWCNT electrodes have been raised 2 times. By combining the high capacity Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ cathodes and the superiority of the free-standing structure, the energy density of lithium-ion batteries can be highly enhanced and this design holds great potential to be used with future electronic devices.

中文翻译：

用于高能锂离子电池的独立式Li _1.2 Mn _0.54 Ni _0.13 Co _0.13 O ₂ / MWCNT框架†

自立式Li _1.2 Mn _0.54 Ni _0.13 Co _0.13 O ₂ / MWCNT（LLO / MWCNT）框架电极已经成功地用于高能量密度锂离子电池。通过构建3D导电网络，LLO / MWCNT电池表现出卓越的电化学性能。具体地说，LLO / MWCNT电池在0.1 C（1 C = 250 mA g ^-1）时具有318.2 mA hg ^-1的高初始放电容量，库仑效率为91.1％。在1 C下进行200次循环后，LLO / MWCNT电池仍可提供209.2 mA hg ^-1，对应的容量保留率为95.9％。此外，LLO / MWCNT电极在10 C下经过500次循环后仍可提供121.6 mA hg ^-1的高放电容量。与传统电极相比，独立式LLO / MWCNT电极可将总重量减少多达47％ LLO / MWCNT电极的活性材料提高了2倍。通过将高容量的Li _1.2 Mn _0.54 Ni _0.13 Co _0.13 O ₂阴极与独立式结构的优势相结合，可以大大提高锂离子电池的能量密度，并且这种设计具有巨大的潜力可用于未来的电子产品。设备。

更新日期：2018-10-05

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