Energy Storage and Distributed Resources Division , Lawrence Berkeley National Laboratory , 1 Cyclotron Road , Berkeley , California 94720 , United States.
ACS Appl Mater Interfaces. 2018 Nov 21;10(46):39570-39580. doi: 10.1021/acsami.8b00083. Epub 2018 Nov 12.
A high-performance boron-containing gel polymer electrolyte (GPE) with semi-interpenetrating polymer network structure was successfully prepared by a rapid and easy one-step polymerization process assisted with UV light, exploiting poly(ethylene oxide) as a polymer host, the novel borate ester monomer as the cross-linker, and LiClO and EMIMBF both as the plasticizer and electrolytic salt, respectively. Owing to the incorporation of anion-trapping boron sites, the ionic conductivity of the as-prepared GPE at room temperature can be up to 5.13 mS cm. In addition, the boron-containing GPE (B-GPE) exhibits favorable mechanical strength, excellent thermal stability, and extremely low flammability. Moreover, the all-solid-state symmetric supercapacitor using B-GPE as the electrolyte and reduced graphene oxide as the electrode was fabricated and exhibited a broad potential window (3.2 V). The all-solid-state symmetric supercapacitor based on B-GPE can still reach a high energy density of 27.62 W h kg with a power density of 6.91 kW kg at a high current density of 5 A g. After 5000 cycles at a current density of 1 A g, the all-solid-state supercapacitor with B-GPE displays a decent capacitance retention of 91.2%.
一种具有互穿聚合物网络结构的高性能含硼凝胶聚合物电解质（GPE）通过快速简便的紫外光辅助一步聚合工艺成功制备，该工艺利用聚环氧乙烷（PEO）作为聚合物主体，新型硼酸酯单体作为交联剂，LiClO 和 EMIMBF 分别作为增塑剂和电解质盐。由于引入了阴离子捕获硼位点，所制备的 GPE 在室温下的离子电导率可达 5.13 mS cm。此外，含硼 GPE（B-GPE）具有良好的机械强度、优异的热稳定性和极低的可燃性。此外，还使用 B-GPE 作为电解质和还原氧化石墨烯作为电极构建了全固态对称超级电容器，并表现出较宽的电位窗口（3.2 V）。基于 B-GPE 的全固态对称超级电容器在 5 A g 的高电流密度下仍可达到 27.62 W h kg 的高能量密度和 6.91 kW kg 的高功率密度。在 1 A g 的电流密度下循环 5000 次后，具有 B-GPE 的全固态超级电容器的电容保持率为 91.2%。
