For the first time, we design and synthesise a novel structure of hollow carbon nanosheets with MgAl-layered double hydroxide (MgAl-LDH) as the template and poly-dopamine (PDA) as the carbon source via a facile method. To reveal the significance of hollow carbon nanosheets, buffering large strains during the lithium de-intercalation cycle and prolonging the cycle life, SnO₂@C nanocomposites as anode materials for lithium-ion batteries (LIBs) are prepared. As a result, the structure of hollow carbon nanosheets contributes to the improvement of the capacity and stability of the SnO₂ anode material. The capacity of hollow SnO₂@carbon nanosheets remains 693 mA h g⁻¹ after 450 cycles with the current density of 0.5 A g⁻¹ far better than that of pristine SnO₂.

中文翻译：

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N掺杂空心碳纳米片负载的SnO ₂纳米粒子

首次，我们设计并合成中空碳纳米片与镁铝-层状双氢氧化物（镁铝-LDH）的新结构为模板和聚多巴胺（PDA）作为碳源通过的简便方法。为了揭示中空碳纳米片的重要性，在锂脱嵌循环过程中缓冲大应变并延长循环寿命，制备了SnO ₂ @C纳米复合材料作为锂离子电池（LIB）的负极材料。结果，中空碳纳米片的结构有助于SnO ₂负极材料的容量和稳定性的提高。中空SnO ₂ @碳纳米片的容量仍为693 mA hg ^-1在450次循环后，电流密度为0.5 A g ^-1远优于原始的SnO ₂。