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Metamorphosis of Seaweeds into Multitalented Materials for Energy Storage Applications

机译：用于储能应用的多重材料的海藻变态

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Transition metal ion dissolution due to hydrofluoric acid attack is a long-standing issue in the Mn-based spinel cathode materials of lithium-ion batteries (LIBs). Numerous strategies have been proposed to address this issue, but only a fragmentary solution has been established. In this study, reported is a seaweed-extracted multitalented material, namely, agar, for high-performance LIBs comprising Mn-based cathode materials at a practical loading density (23.1 mg cm(-2) for LiMn2O4 and 10.9 mg cm(-2) for LiNi0.5Mn1.5O4, respectively). As a surface modifier, 3-glycidoxypropyl trimethoxysilane (GPTMS) is employed to enable the agar to have different phase separation behaviors during the nonsolvent-induced phase separation process, thus eventually leading to the fabrication of an outstanding separator membrane that features a well-defined porous structure, superior mechanical robustness, high ionic conductivity, and good thermal stability. The GPTMS-modified agar separator membrane coupled with a pure agar binder to the LiNi0.5Mn1.5O4/graphite full cell leads to exceptional improvement in electrochemical performance outperforming binders and separator membrane in current commercial products even at 55 degrees C; this improvement is due to beneficial features such as Mn2+ chelation and PF5 stabilizing capabilities. This study is believed to provide insights into the potential energy applications of natural seaweeds.
机译：由于氢氟酸发作引起的过渡金属离子溶解是锂离子电池（LIBS）的基于Mn的尖晶石阴极材料中的长期问题。已经提出了许多策略来解决这个问题，但只建立了零碎的解决方案。在该研究中，报道的是一种海藻提取的多重性材料，即琼脂，用于在实际负载密度（23.1mg cm（-2）的基于Mn的阴极材料（23.1mg cm（-2），用于Limn2O4和10.9mg cm（-2 ）分别为LINI0.5MN1.5O4）。作为表面改性剂，使用3-醇氧基丙基三甲氧基硅烷（GPTMS）以使琼脂在非溶剂诱导的相分离过程中能够具有不同的相分离行为，因此最终导致制造具有明确定义的优异分离器膜的制造多孔结构，机械稳健性高，离子电导率高，热稳定性良好。将采用纯琼脂粘合剂与LINI0.5MN1.5O4 /石墨全细胞偶联的用于纯琼脂的琼脂分离器膜导致电化学性能优于电化学性能，即使在55℃下的商业产品中的电化学性能和分离器膜的特殊改善;这种改进是由于诸如MN2 +螯合和PF5稳定能力等有益特征。据信这项研究可以为自然海藻的潜在能源应用提供见解。

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