Spinel lithium manganate (LiMn2O4) is a promising cathode for aqueous lithium-ion batteries (ALIBs). However, due to Mn dissolution and the Jahn-Teller effect it suffers from fast capacity fading, insufficient rate capability, and low overcharge resistance. Herein, a similar to 2-3 nm artificial solid electrolyte interphase (SEI) layer (lithium polyacrylate, LiPAA) is constructed on the commercial LiMn2O4(LiPAA@LiMn2O4). It is realized by anin situpolymerization hydrothermal reaction using an acrylic monomer. This artificial SEI layer can separate the electrode and aqueous electrolyte, thus suppressing Mn dissolution and the Jahn-Teller effect of LiMn2O4. Electrochemical analyses also suggest it may work as the Li(+)conductor/reservoir to improve the Li(+)diffusion coefficient of the electrode. Consequently, as the cathode of ALIBs, LiPAA@LiMn(2)O(4)harvests a high capacity of 119 mA h g(-1)at 0.6C, high rate capability (70 mA h g(-1)at 12C), better durability (85.5%@100 cycles) and superior overcharge resistance.
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机译：锰酸锂锰酸锂（LiMn2O4）是用于锂离子电池（alibs）的有前途的阴极。然而，由于Mn溶解和Jahn-Teller效果，它受到快速容量衰落，速率不足，并且低的过充电阻力。这里，在商业LiMn2O4（Lipaa @ Limn2O4）上构建类似于2-3nm人造固体电解质间（SEI）层（SEI）层（锂聚丙烯酸锂，LIPAA）。通过使用丙烯酸单体的Anin Situpolymerization水热反应实现。这种人造SEI层可以分离电极和水性电解质，从而抑制Mn溶解和LiMn2O4的Jahn-erterner效果。电化学分析还表明它可以用作Li（+）导体/储存器来改善电极的Li（+）扩散系数。因此，作为Alibs的阴极，Lipaa @ Limn（2）O（4）在12℃下收获119 mA Hg（-1）的高容量，更高的速率（-10mA Hg（-1）），更好耐用性（85.5％至100次循环）和优异的过充电耐受性。
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