In order to deal with the shortage of fossil fuel reserves and environmental pollution, lithium-ion batteries (LIBs) have been widely studied as a new type of sustainable green energy device. In the work, the NiSe₂ nanosheets/nanodendrites hierarchical material with two phases is deposited on the framework of three-dimensional nitrogen-doped graphene (NPG) through the hydrothermal method to construct a self-supporting anode for LIBs. The NPG has ultralow self-weight as well as excellent electrical conductivity, which inhibits the agglomeration during the growth of active materials. Furthermore, the unique hierarchical NiSe₂ active material also relieves its structural damage during the charge and discharge process. As a result, the NiSe₂ combined with NPG (NiSe₂@NPG) expresses specific capacities of 860 mAh/g and 568 mAh/g at current densities of 0.2 A/g and 3.2 A/g, respectively, making it a promising lithium-ion battery anode material.

为了应对化石燃料储量短缺和环境污染问题，锂离子电池（LIBs）作为一种新型的可持续绿色能源装置被广泛研究。在这项工作中，通过水热法将具有两相的 NiSe ₂纳米片/纳米枝晶分级材料沉积在三维掺氮石墨烯（NPG）的框架上，以构建用于 LIB 的自支撑阳极。NPG 具有超低的自重和优异的导电性，可抑制活性材料生长过程中的团聚。此外，独特的分层NiSe ₂活性材料还减轻了其在充放电过程中的结构损伤。因此，NiSe ₂结合NPG（NiSe ₂ @NPG）在0.2 A/g和3.2 A/g的电流密度下分别表现出860 mAh/g和568 mAh/g的比容量，使其成为一种很有前途的锂离子电池负极材料。