The high level of lithium storage in synthetic porous carbons has necessitated the development of accurate models for estimating the specific capacity of carbon-based lithium-ion battery (LIB) anodes. To date, various models have been developed to estimate the storage capacity of lithium in carbonaceous materials. However, these models are complex and do not take into account the effect of porosity in their estimations. In this paper, a novel model is proposed to predict the specific capacity of porous carbon LIB anodes. For this purpose, a new factor is introduced, which is called normalized surface area. Considering this factor, the contribution of surface lithium storage can be added to the lithium stored in the bulk to have a better prediction. The novel model proposed in this study is able to estimate the lithium storage capacity of LIB anodes based on the porosity of porous carbons for the first time. Benefiting porosity value (specific surface area) makes the predictions quick, facile, and sensible for the scientists and experts designing LIBs using porous carbon anodes. The predicted capacities were compared with that of the literature reported by experimental works. The remarkable consistency of the measured and predicted capacities of the LIB anodes also confirms the validity of the approach and its reliability for further predictions.

    Abstract
    1 Introduction
    2 Model setup
        2.1 Graphite
        2.2 Disordered carbons
        2.3 Surface capacity
        2.4 Total capacity
    3 Model verification
    4 Conclusions
    Acknowledgements 
    References

• Majid Shaker(Chongqing 2D Materials Institute, Liangjiang New Area)
• Ali Asghar Sadeghi Ghazvini(Department of Materials Science and Engineering, Tarbiat Modares University)
• Faisal Raza Qureshi(College of Chemical Engineering and Technology, Beijing University of Chemical Technology)
• Reza Riahifar(Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center)