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High Performance LiMn1.9Al0.1O4 Porous Microspheres Rapidly Self‐Assembled through an Acetylene‐Black‐Assisted Solid‐State Approach
ChemElectroChem ( IF 4 ) Pub Date : 2018-12-05 , DOI: 10.1002/celc.201801609
Xinghua Tan 1, 2 , Limin Guo 1, 2 , Yi Jiang 1, 2 , Shengnan Liu 1, 2 , Jiangtao Zhang 1, 3 , Jianxin Wu 1, 3 , Xiaohong Kang 3 , Hanfu Wang 1 , Weiguo Chu 1, 3
Affiliation  

We present a novel approach for preparing porous LiMn1.9Al0.1O4 microspheres with diameters of about 2 μm through direct calcination of solid monolith‐like precursors formed by simply mixing acetylene black and nitrate. The introduction of aluminium not only causes lattice doping of manganese but also plays an indispensable role in the formation of the porous microsphere structure assisted by acetylene black as both a solution absorbent and a pore‐forming agent. Porous LiMn1.9Al0.1O4 microspheres with an optimized aluminium concentration demonstrate a superior rate capability of 121 mAh g−1 at 1 C and 94 mAh g−1 at 40 C, and an excellent cyclic performance with a capacity retention of 82 % at 1 C after 700 cycles. The excellent electrochemical performance results from the unique porous microspheres assembled by nanoparticles and the doping of Al. The approach proposed herein is facile, inexpensive, and environmentally friendly and could also be extended to the mass production of other electrode materials.

中文翻译:

通过乙炔-黑辅助固态方法快速自组装的高性能LiMn1.9Al0.1O4多孔微球

我们提出了一种通过直接煅烧简单混合乙炔黑和硝酸盐形成的固体整体样前体来制备直径约为2μm的多孔LiMn 1.9 Al 0.1 O 4微球的新方法。铝的引入不仅引起锰的晶格掺杂,而且在乙炔黑作为溶液吸收剂和成孔剂的辅助下,在形成多孔微球结构中起着不可或缺的作用。多孔的LiMn 1.9的Al 0.1 ø 4微球具有优化的铝浓度证明的121毫安g的优异的倍率性能-1在1℃和94毫安克-1在40 C的温度下,具有出色的循环性能,在700个循环后,在1 C下的容量保持率为82%。优异的电化学性能归因于由纳米颗粒组装的独特多孔微球和Al的掺杂。本文提出的方法是容易的,便宜的和环境友好的,并且还可以扩展到其他电极材料的批量生产。
更新日期:2018-12-05
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