High Energy Density Sodium‐Ion Battery with Industrially Feasible and Air‐Stable O3‐Type Layered Oxide Cathode,Advanced Energy Materials

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High Energy Density Sodium‐Ion Battery with Industrially Feasible and Air‐Stable O3‐Type Layered Oxide Cathode
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-10-09 , DOI: 10.1002/aenm.201701610
Jianqiu Deng _{1,

2} , Wen-Bin Luo ₁ , Xiao Lu ₁ , Qingrong Yao ₂ , Zhongmin Wang ₂ , Hua-Kun Liu ₁ , Huaiying Zhou ₂ , Shi-Xue Dou ₁

Affiliation

Extensive effort is being made into cathode materials for sodium‐ion battery to address several fatal issues, which restrict their future application in practical sodium‐ion full cell system, such as their unsatisfactory initial Coulombic efficiency, inherent deficiency of cyclable sodium content, and poor industrial feasibility. A novel air‐stable O3‐type Na[Li_0.05Mn_0.50Ni_0.30Cu_0.10Mg_0.05]O₂ is synthesized by a coprecipitation method suitable for mass production followed by high‐temperature annealing. The microscale secondary particle, consisting of numerous primary nanocrystals, can efficiently facilitate sodium‐ion transport due to the short diffusion distance, and this cathode material also has inherent advantages for practical application because of its superior physical properties. It exhibits a reversible capacity of 172 mA h g⁻¹ at 0.1 C and remarkable capacity retention of 70.4% after 1000 cycles at 20 C. More importantly, it offers good compatibility with pristine hard carbon as anode in the sodium‐ion full cell system, delivering a high energy density of up to 215 W h kg⁻¹ at 0.1 C and good rate performance. Owing to the high industrial feasibility of the synthesis process, good compatibility with pristine hard carbon anode, and excellent electrochemical performance, it can be considered as a promising active material to promote progress toward sodium‐ion battery commercialization.

中文翻译：

高能量密度钠离子电池，具有工业上可行且稳定的O3型分层氧化物阴极

钠离子电池正极材料正投入大量精力以解决一些致命问题，这些问题限制了它们在实际的钠离子全电池系统中的未来应用，例如其初始库仑效率不令人满意，可循环钠含量的固有缺陷以及较差的性能。工业可行性。一种新型的空气稳定的O3型Na [Li _0.05 Mn _0.50 Ni _0.30 Cu _0.10 Mg _0.05 ] O ₂通过适合大规模生产的共沉淀方法合成，然后进行高温退火。由许多初级纳米晶体组成的微米级次级粒子由于扩散距离短，可以有效地促进钠离子的运输，而且这种阴极材料还具有优越的物理性能，因此在实际应用中也具有固有的优势。它在0.1 C时表现出172 mA hg ^-1的可逆容量，在20 C时经过1000次循环后显示出显着的容量保持率70.4％。更重要的是，它与作为钠离子全电池系统阳极的原始硬质碳具有良好的相容性，提供高达215 W h kg ^-1的高能量密度在0.1 C和良好的速率性能下。由于合成工艺的高工业可行性，与原始硬碳阳极的良好相容性以及出色的电化学性能，可以认为它是促进钠离子电池商业化发展的有前途的活性材料。

更新日期：2017-10-09

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