Mesoporous Mn-Sn bimetallic oxide (BO) nanocubes with sizes of 15–30 nm show outstanding stable and reversible capacities in lithium ion batteries (LIBs), reaching 856.8 mAh·g^–1 after 400 cycles at 500 mA·g^–1 and 506 mAh·g^–1 after 850 cycles at 1,000 mA·g^–1. The preliminary investigation of the reaction mechanism, based on X-ray diffraction measurements, indicates the occurrence of both conversion and alloying–dealloying reactions in the Mn-Sn bimetallic oxide electrode. Moreover, Mn-Sn BO//LiCoO₂ Li-ion full cells were successfully assembled for the first time, and found to deliver a relatively high energy density of 176.25 Wh·kg^–1 at 16.35 W·kg^–1 (based on the total weight of anode and cathode materials). The superior long-term stability of these materials might be attributed to their nanoscale size and unique mesoporous nanocubic structure, which provide short Li⁺ diffusion pathways and a high contact area between electrolyte and active material. In addition, the Mn-Sn BOs could be used as advanced sulfur hosts for lithium-sulfur batteries, owing to their adequate mesoporous structure and relatively strong chemisorption of lithium polysulfide. The present results thus highlight the promising potential of mesoporous Mn-Sn bimetallic oxides for application in Li-ion and Li-S batteries.

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尺寸为15–30 nm的介孔Mn-Sn双金属氧化物（BO）纳米立方体在锂离子电池（LIB）中显示出出色的稳定和可逆容量，在500 mA·g ^–1和506下400次循环后达到856.8 mAh·g ^–1毫安·^克-1在千毫安850次循环后·^克-1。根据X射线衍射测量对反应机理进行的初步研究表明，在Mn-Sn双金属氧化物电极中同时发生了转化反应和合金化脱合金反应。此外，首次成功组装了Mn-Sn BO // LiCoO ₂锂离子全电池，并发现在16.35 W·kg ^–1时可提供176.25 Wh·kg ^–1的相对较高的能量密度。（基于阳极和阴极材料的总重量）。这些材料优异的长期稳定性可能归因于其纳米级尺寸和独特的介孔纳米立方结构，这些结构提供短的Li ⁺扩散途径以及电解质与活性材料之间的高接触面积。此外，由于Mn-Sn BOs具有足够的介孔结构和对多硫化锂的较强化学吸附性，因此可以用作锂硫电池的高级硫主体。因此，本发明结果突出了介孔Mn-Sn双金属氧化物在锂离子和Li-S电池中的应用前景广阔。

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