Rui Wang

Layered Li-rich manganese-based Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ (LNCMO) is regarded as a promising high-capacity cathode material. However, its commercial application is severely hindered by rapid capacity fading, serious voltage decay and poor cycling stability. Herein, a facile non-sintering electrostatic adsorption strategy employing PDDA is proposed to fabricate a uniform and dense graphene oxide (GO) coating on LNCMO particles. Structural and morphological characterizations confirm the successful decoration of GO on the surface of LNCMO. The optimized 0.5@LNCMO sample delivers a discharge capacity of 330 mAh g⁻¹ at 0.1C, and maintains a capacity retention of 86.5% after 200 cycles at 1C and 83.3% after 400 cycles at 5C, showing much better electrochemical performance than pristine LNCMO. This study proves that the proposed strategy is an effective modification method for constructing high-performance Li-rich cathode materials.

CVD-fabricated 3D integrated Cu/Si anode delivers 3450 mAh g ⁻¹ at 0.5 A g ⁻¹ with 85% ICE.

To address the challenges faced by the P2-type layered transition-metal oxide (NaxTMO2) sodium-ion battery (SIB) cathodes, such as irreversible phase transitions and Na + /vacancy ordering during cycling, this work...

A bimetallic phosphide Ni ₂ P/CoP composite is rationally constructed and utilized as a multifunctional separator to effectively accelerate lithium polysulfide conversion kinetics.

Ether-based electrolytes are widely acknowledged for their potential to form stable solid electrolyte interfaces (SEIs) for stable anode performance. However, conventional ether-based electrolytes have shown a tendency for cation-solvent co-intercalation phenomena on graphite electrodes, resulting in lower capacity and higher voltage platforms compared to those of neat cation insertion in ester-based electrolytes. In response, we propose the development of weakly solvating ether solvents to weaken the interaction between cations and solvents, thereby suppressing co-intercalation behavior. In this study, theoretical calculations first demonstrate that tetrahydrofuran (THF) exhibits a smaller binding energy (-0.89 eV) with K⁺ in comparison to 1,2-dimethoxyethane (DME, -1.37 eV) and ethylene carbonate (EC, -1.26 eV). Consequently, solvent co-intercalation, electrolyte decomposition, and graphite exfoliation are suppressed in a 1 M solution of K salt in THF. Simultaneously, a uniform and robust SEI is formed to improve the K⁺ storage stability of the graphite anode (99% capacity retention after 200 cycles at 0.1 A g^-1). Meanwhile, such a THF-based K-ion electrolyte also exhibits good adaptability when applied to both hard and soft carbonaceous anodes. This work addresses the challenges associated with achieving high capacity and stable graphite anodes in ether-based electrolytes, offering a solution to the problem of cation-solvent co-intercalation. The findings also promote the application of graphite anodes in potassium-ion batteries, emphasizing the significance of weakly solvating ether electrolytes in enhancing battery performance and stability.

A multifunctional sulfur host, Ti₃C₂T_x/VS₂, is developed by incorporating VS₂ onto the surface of few-layer Ti₃C₂T_x using a self-assembly method. A 3D-printed Ti₃C₂T_x/VS₂/S cathode with high sulfur loading achieves high areal capacity.

Commercial graphite is electrospun into network-like carbon fibers, which can efficiently withstand the volume expansion during K⁺ insertion and thus achieve excellent cycling stability and fast K⁺-intercalation kinetics.

Solid oxide electrolysis cells (SOECs) show significant promise in converting CO₂ to valuable fuels and chemicals, yet exploiting efficient electrode materials poses a great challenge. Perovskite oxides, known for their stability as SOEC electrodes, require improvements in electrocatalytic activity and conductivity. Herein, vanadium(V) cation is newly introduced into the B-site of Sr₂Fe_1.5Mo_0.5O_6-δ perovskite to promote its electrochemical performance. The substitution of variable valence V⁵⁺ for Mo⁶⁺ along with the creation of oxygen vacancies contribute to improved electronic conductivity and enhanced electrocatalytic activity for CO₂ reduction. Notably, the Sr₂Fe_1.5Mo_0.4V_0.1O_6-δ based symmetrical SOEC achieves a current density of 1.56 A cm^-2 at 1.5 V and 800 °C, maintaining outstanding durability over 300 h. Theoretical analysis unveils that V-doping facilitates the formation of oxygen vacancies, resulting in high intrinsic electrocatalytic activity for CO₂ reduction. These findings present a viable and facile strategy for advancing electrocatalysts in CO₂ conversion technologies.