Review of the use of transition-metal-oxide and conducting polymer-based fibres for high-performance supercapacitors

Heteroatom-doped carbon-based materials for lithium and sodium ion batteries

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Regulation of Lamellar Structure of Vanadium Oxide via Polyaniline Intercalation for High-Performance Aqueous Zinc-Ion Battery

Interface issues of lithium metal anode for high-energy batteries: Challenges, strategies, and perspectives

Lithium metal is considered as the most promising anode material due to its high theoretical specific capacity and the low electrochemical reduction potential. However, severe dendrite problems have to be addressed for fabricating stable and rechargeable batteries (e.g., lithium-iodine batteries). To fabricate a high-performance lithium-iodine (Li-I2 ) battery, a 3D stable lithium metal anode is prepared by loading of molten lithium on carbon cloth doped with nitrogen and phosphorous. Experimental observations and theoretical calculation reveal that the N,P codoping greatly improves the lithiophilicity of the carbon cloth, which not only enables the uniform loading of molten lithium but also facilitates reversible lithium stripping and plating. Dendrites formation can thus be significantly suppressed at a 3D lithium electrode, leading to stable voltage profiles over 600 h at a current density of 3 mA cm-2 . A fuel cell with such an electrode and a lithium-iodine cathode shows impressive long-term stability with a capacity retention of around 100% over 4000 cycles and enhanced high-rate capability. These results demonstrate the promising applications of 3D stable lithium metal anodes in next-generation rechargeable batteries.

A 3D and Stable Lithium Anode for High-Performance Lithium-Iodine Batteries.

A flexible solid-state supercapacitor based on graphene/polyaniline paper electrodes

Rechargeable lithium-iodine (Li-I2) battery is a promising energy storage system because of the high energy and power density. However, the shuttle effects of iodine species and the unstable features of I2 block the practical applications of Li-I2 batteries. Herein, a dual heteroatom doped porous carbon cloth is fabricated as the host material for lithium iodide (LiI). Specifically, the self-standing nitrogen, phosphorus co-doped carbon cloth with high LiI loading exhibits a large specific capacity (221 mAh·g−1 at 1 C), excellent rate capability (95.8% capacity retention at 5 C) and superior long cycling stability (2,000 cycles with a capacity retention of 96%). Electrochemical kinetic analysis confirms the dominant contribution of capacitive effects at high scan rates, which is responsible for the good high-rate performance. The improved electrochemical performance mainly stems from two unique features of nitrogen, phosphorus co-doped porous carbon cloth. Heteroatom doping provides extra active sites for strong adsorption of iodine species while the highly porous structure with large surface area favors the capacitive effects at high rates. This work provides a facile yet efficient approach to regulating both redox reaction and capacitive effects via adjusting surface composition and pore structure of carbon materials for enhanced battery performance.

Kang Li

Papers

Regulation of Lamellar Structure of Vanadium Oxide via Polyaniline Intercalation for High-Performance Aqueous Zinc-Ion Battery

A 3D and Stable Lithium Anode for High-Performance Lithium-Iodine Batteries.

A flexible solid-state supercapacitor based on graphene/polyaniline paper electrodes

Nitrogen, phosphorus co-doped carbon cloth as self-standing electrode for lithium-iodine batteries

One-dimensional π-d conjugated coordination polymer with double redox-active centers for all-organic symmetric lithium-ion batteries