离子液体助力高能密度锂离子电池用 FeS2。
Ionic liquid enabled FeS2 for high-energy-density lithium-ion batteries.
机构信息
Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO, 80309, USA.
出版信息
Adv Mater. 2014 Nov 19;26(43):7386-92. doi: 10.1002/adma.201402103. Epub 2014 Sep 18.
High-energy-density FeS2 cathodes en-abled by a bis(trifluoromethanesulfonyl)imide (TFSI-) anion-based room temperature ionic liquid (RTIL) electrolyte are demonstrated. A TFSI-based ionic liquid (IL) significantly mitigates polysulfide dissolution, and therefore the parasitic redox shuttle mechanism, that plagues sulfur-based electrode chemistries. FeS2 stabilization with a TFSI(-) -based IL results in one of the highest energy density cathodes, 542 W h kg(-1) (normalized to cathode composite mass), reported to date.
通过使用双（三氟甲烷磺酰基）亚胺（TFSI-）阴离子基室温离子液体（RTIL）电解质，展示了高能量密度的 FeS2 正极。TFSI-基离子液体（IL）显著减轻了多硫化物的溶解，从而抑制了困扰基于硫的电极化学的寄生氧化还原穿梭机制。用 TFSI(-)基 IL 稳定 FeS2 导致迄今为止报道的最高能量密度正极之一，即 542 W h kg(-1)（相对于正极复合材料质量归一化）。
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