Liang Xiaoxin, Liu Cunsheng, Liao Songyi, Yao Selina X, He Minghui
State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China.
College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong 510225, China.
ACS Appl Mater Interfaces. 2024 Jan 31;16(4):4661-4670. doi: 10.1021/acsami.3c15889. Epub 2024 Jan 17.
The recently developed advanced electrolytes possess many crucial qualities, including robust stability, Li dendrite-free, and comparable interface compatibility, for the manufacturing of Li metal batteries with a high energy density. In this study, lithium bis(trifluoromethane)sulfonimide, acrylamide, and succinonitrile were first used to design a polymerizable monomer. Then, it went through in situ thermal polymerization to attain a new solid polymer electrolyte [named poly(PDES)]. The synthesized poly(PDES) electrolyte achieved higher ionic conductivity (∼1.89 × 10 S cm), oxidation potential (∼5.10 V versus Li/Li), and a larger lithium-ion transfer number (∼0.63). Moreover, poly(PDES) was nonflammable and could effectively inhibit the formation of Li dendrites. As a result, the assembled batteries using the poly(PDES) electrolyte for both Li||LiFePO and Li||LiNiCoMnO exhibited excellent interface compatibility and electrochemical performances. This poly(PDES) electrolyte has promising potential for broad application in lithium-metal batteries with elevated energy density and safety performance in the near future.
最近开发的先进电解质具有许多关键特性，包括强大的稳定性、无锂枝晶以及可比的界面兼容性，可用于制造高能量密度的锂金属电池。在本研究中，首先使用双（三氟甲烷）磺酰亚胺锂、丙烯酰胺和丁二腈来设计一种可聚合单体。然后，它经过原位热聚合以获得一种新型固体聚合物电解质[命名为聚（PDES）]。合成的聚（PDES）电解质实现了更高的离子电导率（约1.89×10 S cm）、氧化电位（相对于Li/Li约为5.10 V）和更大的锂离子迁移数（约0.63）。此外，聚（PDES）不可燃，并且可以有效抑制锂枝晶的形成。因此，使用聚（PDES）电解质组装的Li||LiFePO和Li||LiNiCoMnO电池均表现出优异的界面兼容性和电化学性能。这种聚（PDES）电解质在不久的将来具有在能量密度和安全性能更高的锂金属电池中广泛应用的潜力。
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