4.8 Article

Tunable ultrathin dual-phase P-doped Bi2MoO6 nanosheets for advanced lithium and sodium storage

Journal

NANO RESEARCH
Volume 15, Issue 7, Pages 6128-6137

Publisher

TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-4198-5

Keywords

amorphous/nanocrystalline dual-phase structure; ultrathin nanosheets; P-doped Bi2MoO6; anode materials; lithium-ion batteries; sodium-ion batteries

Funding

  1. Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone Shenzhen Park Project [HZQB-KCZYB-2020030]
  2. National Key R&D Program of China [2017YFA0204403]
  3. Hong Kong Innovation and Technology Commission via the Hong Kong Branch of National Precious Metals Material Engineering Research Center

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This study successfully synthesizes ultrathin P-doped Bi2MoO6 nanosheets via a wet-chemical synthesis approach. These nanosheets possess a unique amorphous/nanocrystalline dual-phase structure, with fast ion exchange ability and excellent volume change buffer capability. As electrode materials for lithium-ion batteries and sodium-ion batteries, the P-BiMO-6 electrode exhibits good reversible capacity and improved rate performance.
The construction of electrode materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) has gradually been an appealing and attractive technology in energy storage research field. In the present work, a facile strategy of synthesizing ultrathin amorphous/nanocrystal dual-phase P-doped Bi2MoO6 (denoted as P-BiMO) nanosheets via a one-step wet-chemical synthesis approach is explored. Quite distinct from conventional two-dimensional (2D) nanosheets, our newly developed ultrathin P-BiMO nanosheets exhibit a unique tunable amorphous/nanocrystalline dual-phase structure with several compelling advantages including fast ion exchange ability and superb volume change buffer capability. The experimental results reveal that our prepared P-BiMO-6 electrode delivers an excellent reversible capacity of 509.6 mA.g(-1) after continuous 1,500 cycles at the current densities of 1,500 mA.g(-1) and improved rate performance for LIBs. In the meanwhile, the P-BiMO-6 electrode also shows a reversible capacity of 300.6 mA.g(-1) after 100 cycles at 50 mA.g(-1) when being used as the SIBs electrodes. This present work uncovers an effective dual-phase nanosheet structure to improve the performance of batteries, providing an attractive paradigm to develop superior electrode materials.

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