Designing novel carbon-based materials (such as graphene, modified graphite, hard carbon, soft carbon, CNTs, Si-C, porous carbon) with stable morphology, outstanding conductivity as well as superior dispersibility are greatly challenge for obtaining high electrochemical performance of lithium-ion battery and lithium-ion capacitor, even at subzero temperatures.
Carbon-based Li/Na-ion batteries have been widely applied and investigated because of it has both high energy and power density. However, their real application are still hindered by inferior rate performance, poor cycling stability and low energy density. It is well known that graphite has been widely used as a commercially available anode material in lithium-ion battery (LIBs). However, graphite served as anode material in Li/Na-ion batteries has slow Li+ exfoliation/insertion kinetic reaction process, poor fast-charge performance and unstable morphology, which will resulting in low capacity, poor fast charge performance and poor long-term cycling stability at high current density. Therefore, developing carbon-based materials with low and long charge plateau, high specific capacity, excellent fast-charging performance and long-term cycling stability is an effective strategy to obtain high performance carbon-based Li/Na-ion batteries.
Develop a novel method for designing unique carbon-based material such as graphene, modified graphite, CNTs, hard carbon, soft carbon, porous carbon materials and Si-C composite. Using these as-prepared carbon-based materials as electrodes in Li-ion battery and Sodium-ion battery. Moreover, teste the corresponding electrochemical performance including capacity, rate performance and cycling stability, and further explore the detailed lithium-ion or sodium-ion storage mechanisms of carbon-based materials in these storage devices.
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Keywords: Preparation of carbon-based material, Structural design, Multi-scale structural characterization, Graphene or CNTs dispersing mechanism, low-temperature performance, The gravimetric and volumetric energy density and power density, Theoretical model
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