Recently, Prof. HUANG Xingjiu and Asso. Prof. LIU Jinyun et al. in Institute of Intelligent Machines (IIM), Hefei Institutes of Physical Science, published an invited review about energy storage material in the internationally authoritative journal of the materials chemistry field "Journal of Materials Chemistry A" (Three-dimensional graphene-based nanocomposites for high energy density Li-ion batteries. J. Mater. Chem. A, 2017, DOI: 10.1039/C7TA00448F). In this review, high-energy density lithium-ion battery research are summarized comprehensively, particularly focusing on 3D graphene-based nanocomposite electrodes which exhibit large energy density,  high capacity, and good rate performance.

High energy density Li-ion batteries have broad perspectives on applications in the energy storage field, such as in electric vehicles. This review presents the recent research progresses on electrode nanocomposites consisting of 3D graphene and electrochemically active materials, e.g. graphene cooperated with LiFePO₄, V₂O₅ , and Li₂MnSiO₄ as anodes, and graphene with Si, Ge, metal oxides and sulfides as cathodes. It is demonstrated that the 3D graphene within the nanocomposites is able to provide conductive 3D network, improve the transfer of Li⁺ ion and charge and accommodate the structure and volume change during lithiation-delithiation.

The following research directions are pointed out in this review. The research focal point of next generation high energy density batteries lies in the  preparation of 3D graphene-based battery/supercapacitor hybrid devices, 3D  graphene cooperating with high voltage cathode materials including LiNi_1-x-yCo_xMnyO₂ (such as LiNi_1/3Co_1/3Mn_1/3O₂), LiNi_1-x-yCo_xAl_yO₂ (such as LiNi_0.8Co_0.15Al_0.05O₂), and LiMn₂O₄ , as well as with NiCo₂O₄ and Sn/Co anodes, , increasing the tap density and capacity performance of electrode materials for practical applications; a well compatible electrolyte to match the electrode system, especially for the system working at a high voltage.