@article{Wang2025, 
author = {Yonglin Wang and Zhe Huang and Yuning Li},
title = {Enhancing stability and rate performance of Li2DHBQ cathodes in lithium-ion batteries via FEC-derived cathode–electrolyte interphase},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {10},
pages = {94907761},
keywords = {morphology, capacitive effect, 2,5-dihydroxy-1,4-benzoquinone (DHBQ), cathode electrolyte interphase (CEI), fluoroethylene carbonate (FEC)},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907761},
doi = {10.26599/NR.2025.94907761},
abstract = {Organic cathode materials present a promising alternative for the inorganic counterparts in conventional lithium-ion batteries (LIBs) due to lower cost, reduced environmental impact, renewability, and enhanced energy density. However, their practical application is hindered by dissolution in electrolytes, structural degradation, and sluggish lithium-ion transport. In this study, we introduce fluoroethylene carbonate (FEC) as an electrolyte additive to engineer a protective cathode–electrolyte interphase (CEI) layer, effectively mitigating cathode pulverization and enhancing battery stability of the organic cathode material, dilithium salt of 2,5-dihydroxy-1,4-benzoquinone (Li2DHBQ). Electrochemical, morphological, and compositional analyses, including cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), confirm that an optimal 1% FEC concentration forms a uniform CEI layer, significantly improving structural integrity and reducing interfacial resistance. Consequently, the battery with 1% FEC retains 185 mAh·g−1 after 200 cycles at 500 mA·g−1, with a capacity decay rate of just 0.049% per cycle, compared to 81 mAh·g−1 and 0.302% per cycle for the FEC-free battery. Additionally, the 1% FEC battery exhibits a capacitive charge storage contribution of up to 93.7%, resulting in excellent rate performance. These findings underscore the crucial role of CEI engineering in stabilizing organic cathodes, offering a practical approach to achieving high-rate and long-cycle LIBs.}
}