Limited by the sluggish kinetics of conversion‐type anodes from huge diffusion‐controlled phase transformation and unsatisfactory capacities of intercalation/alloy‐type anodes, the performances of lithium‐based dual ion batteries (LDIBs) remain to be promoted. Herein, for the first time, ultra‐small manganese silicate (MS) nanosheets anchored on reduced graphene oxides (MSR) with enhanced diffusion kinetics are constructed, realizing the construction of high performance LDIBs on the basis of conversion‐type anodes. The ion diffusion rate of MSR is promoted by in situ coating Li₄SiO₄ ionic conductor on the electrode surface during lithiation process. Simultaneously, the ion diffusion pathways are shortened by partially converting the diffusion‐controlled bulk reaction to surface reaction with massive pseudocapacitive contribution. Consequently, the MSR‐based LDIB exhibits superior electrochemical performances with discharge capacities of 191 mA h g⁻¹ at 0.5 C and 128 mA h g⁻¹ at 2 C after 150 cycles, exceeding to those of reported LDIBs and benefiting the future electrode design of LDIBs.

中文翻译：

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转换型硅酸锰阳极具有增强的离子可及性，可实现高性能双离子电池

受巨大的扩散控制的相变和插层/合金型阳极容量不足的限制，转换型阳极的动力学缓慢，锂基双离子电池（LDIBs）的性能仍有待提高。本文首次构建了锚固在还原石墨烯氧化物（MSR）上的超小型硅酸锰（MS）纳米片，具有增强的扩散动力学，从而在转化型阳极的基础上实现了高性能LDIB的构建。通过原位涂覆Li ₄ SiO ₄促进MSR的离子扩散速率锂化过程中电极表面上的离子导体。同时，通过将扩散控制的本体反应部分转化为具有大量拟电容贡献的表面反应，缩短了离子扩散途径。因此，基于MSR的LDIB表现出卓越的电化学性能，在150个循环后，其放电容量在0.5 C时为191 mA h g ^-1，在2 C时为128 mA h g ^-1。