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首页> 外文期刊>Advanced energy materials >Slurry-Fabricable Li~+-Conductive Polymeric Binders for Practical All-Solid-State Lithium-Ion Batteries Enabled by Solvate Ionic Liquids
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Slurry-Fabricable Li~+-Conductive Polymeric Binders for Practical All-Solid-State Lithium-Ion Batteries Enabled by Solvate Ionic Liquids

机译：用于溶剂化离子液体的实用全固态锂离子电池的浆料制造型Li〜+导电聚合物粘合剂

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摘要

For mass production of all-solid-state lithium-ion batteries (ASLBs) employing highly Li+ conductive and mechanically sinterable sulfide solid electrolytes (SEs), the wet-slurry process is imperative. Unfortunately, the poor chemical stability of sulfide SEs severely restrict available candidates for solvents and in turn polymeric binders. Moreover, the binders interrupt Li+-ionic contacts at interfaces, resulting in the below par electrochemical performance. In this work, a new scalable slurry fabrication protocol for sheet-type ASLB electrodes made of Li+-conductive polymeric binders is reported. The use of intermediatepolarity solvent (e.g., dibromomethane) for the slurry allows for accommodating Li6PS5Cl and solvate-ionic-liquid-based polymeric binders (NBR-Li(G3) TFSI, NBR: nitrile-butadiene rubber, G3: triethylene glycol dimethyl ether, LiTFSI: lithium bis(trifluoromethanesulfonyl) imide) together without suffering from undesirable side reactions or phase separation. The LiNi0.6Co0.2Mn0.2O2 and Li4Ti5O12 electrodes employing NBR-Li(G3) TFSI show high capacities of 174 and 160 mA h g(-1) at 30 degrees C, respectively, which are far superior to those using conventional NBR (144 and 76 mA h g(-1)). Moreover, high areal capacity of 7.4 mA h cm(-2) is highlighted for the LiNi0.7Co0.15Mn0.15O2 electrodes with ultrahigh mass loading of 45 mg cm(-2). The facilitated Li+-ionic contacts at interfaces paved by NBR-Li(G3) TFSI are evidenced by the complementary analysis from electrochemical and 7Li nuclear magnetic resonance measurements.
机译：为了大规模生产采用高Li +导电性和机械可烧结硫化物固体电解质（SEs）的全固态锂离子电池（ASLB），必须采用湿法制浆。不幸的是，硫化物SEs的化学稳定性差，严重限制了溶剂以及聚合物粘合剂的可用候选物。而且，粘合剂中断了界面处的Li +-离子接触，从而导致了低于同等的电化学性能。在这项工作中，报道了一种新的可扩展的浆料制备方案，用于由Li +导电聚合物粘合剂制成的片状ASLB电极。在浆料中使用中等极性溶剂（例如，二溴甲烷）可以容纳Li6PS5Cl和基于溶剂化物离子液体的聚合物粘合剂（NBR-Li（G3）TFSI，NBR：丁腈橡胶，G3：三甘醇二甲醚， LiTFSI：双（三氟甲磺酰基）酰亚胺锂），而不会遭受不良的副反应或相分离。使用NBR-Li（G3）TFSI的LiNi0.6Co0.2Mn0.2O2和Li4Ti5O12电极在30摄氏度时分别显示出174和160 mA hg（-1）的高容量，这远远优于使用传统NBR的电极（144和76 mA hg（-1））。此外，对于LiNi0.7Co0.15Mn0.15O2电极，其超高质量负载为45 mg cm（-2），突出显示了7.4 mA h cm（-2）的高面积容量。 NBR-Li（G3）TFSI铺平的界面上的Li +-离子接触促进作用是通过电化学和7Li核磁共振测量的互补分析证明的。

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