层间距离扩大的二维材料的嵌入结构可以促进质量传输，这在快速充电锂离子电池（LIBs）中很有前景。然而，设计的嵌入结构在恶劣的工作条件下会被粉碎和破坏，导致电池的整体性能恶化。
该文中，研究人员提出了由典型的层状材料MoS2通过聚合物嵌入策略，嵌入N掺杂类石墨烯碳单层（MoS2/g-CM）制成的嵌入异质结构，在循环过程中表现出作为LIBs阳极的可逆重构性的独特行为。提出了一种“碳单层受限拓扑变换”的机制，并通过大量的原位/非原位表征证明了这一点。
MoS2/g-CM的插层异质结构具有可重构性和有效的层间电子/离子传输，表现出前所未有的高达50A g–1的速率能力和卓越的长循环能力。此外，所提出的基于g-CM插层的策略已扩展到MoSe2系统，还实现了插层异质结构的可重构性和更高的LIB性能，展示了其多功能性和巨大的应用潜力。
附：英文原文
Title: Reconstructable Carbon Monolayer-MoS2 Intercalated Heterostructure Enabled by Atomic Layers-Confined Topotactic Transformation for Ultrafast Lithium Storage
Author: Kexuan Liao, Lu Chen, Ruijin Meng, Yutong Feng, Shuo Meng, Hang Lu, Jie Ma, Chengxin Peng, Chi Zhang, Jinhu Yang
Issue&Volume: April 23, 2024
Abstract: The intercalation structure of two-dimensional materials with expanded interlayer distance can facilitate mass transport, which is promising in fast-charging lithium-ion batteries (LIBs). However, the designed intercalation structures will be pulverized and destroyed under tough working conditions, causing overall performance deterioration of the batteries. Here, we present that an intercalated heterostructure made of the typical layered material of MoS2 intercalated by N-doped graphene-like carbon monolayer (MoS2/g-CM) through a polymer intercalation strategy exhibits a unique behavior of reversible reconstructability as an LIB anode during cycling. A mechanism of “carbon monolayers-confined topotactic transformation” is proposed, which is evidenced by substantial in/ex situ characterizations. The intercalated heterostructure of MoS2/g-CM featuring a reconstructable property and efficient interlayer electron/ion transport exhibits an unprecedented rate capability up to 50 A g–1 and outstanding long cyclability. Moreover, the proposed strategy based on g-CM intercalation has been extended to the MoSe2 system, also realizing reconstructability of the intercalated heterostructure and improved LIB performance, demonstrating its versatility and great potential in applications.
DOI: 10.1021/jacs.4c01550
