Zong-Huai Liu

A synergistic structure-directing strategy to construct a Cu-TCPP NSs/Ti ₃ C ₂ T _x NSs fiber supercapacitor with good energy density and high flexibility was undertaken.

(Ti _1/3 V _2/3 ) ₂ CT _x have been synthesized through the etching of bimetallic MAX phase. The obtained (Ti _1/3 V _2/3 ) ₂ CT _x @S cathode exhibit the best electrochemical performance due to the optimized tuning of d-band center for both Ti and V.

Although Ti ₃ C ₂ T _x is an exceptional energy storage material due to its high capacitance, tunable surface functional groups, and excellent electrical conductivity, a disordered interfacial environment caused by the inherent surface terminal groups on the Ti ₃ C ₂ T _x nanosheets causes the slowing of the ion transport kinetics and decrease of the specific capacitance. A simple boron modified Ti ₃ C ₂ T _x surface strategy is developed to covalently anchor boron species onto the Ti ₃ C ₂ T _x surface via B–O–Ti bonds in the present work, B modified Ti ₃ C ₂ T _x electrode material (B‐Ti ₃ C ₂ T _x −400) is obtained and its structure, surface chemistry, and the electrochemical performance are systematically investigated. The modified boron species reorganize the local interfacial environment of Ti ₃ C ₂ T _x nanosheets, reduce ion diffusion resistance, and enhance accessibility of active sites, thus significantly improve the specific capacitance and rate performance, and the as‐prepared B‐Ti ₃ C ₂ T _x −400 material electrode exhibits a high specific capacitance of 491 F g ⁻¹ . Moreover, the assembled B‐Ti ₃ C ₂ T _x ‐400‐based symmetric supercapacitor achieves an energy density of 7.94 Wh kg ⁻¹ (at 400 W kg ⁻¹ ) and retains 88.5% of its initial capacitance over 10,000 charge–discharge cycles at 50 mV s ⁻¹ . This work offers a facile and practical strategy for optimizing the energy storage performance of Ti ₃ C ₂ T _x ‐based energy storage materials through surface chemical modification approach.

Photo-assisted Li–gas batteries have been recognized as one of the most effective strategies for reducing charge/discharge overpotential by incorporating photoelectrodes into conventional gas cathodes. However, the current photo-electrodes have still faced several issues, including narrow solar absorption, inadequate charge carrier separation, etc., which seriously restricted their rate capability and application in complicated Li–Air batteries. Herein, a series of the functionalized D–A configuration COF-n compounds with tunable built-in electric field and low charge-carrier recombination rates were designed and synthesized by optimizing the intramolecular electron distribution. The optimized benzoquinone-based COF-2 exhibited the lowest transition barrier of photon-generated carriers for impressive light absorption, exciton dissociation and charge separation, meanwhile its large D–A potential difference constructed ultra-strong electron push–pull effect, resulting in the strongest and even-distributed built-in electric field. Therefore, the assembled COF-2 based photo-assisted Li–Air battery delivered a record round-trip efficiency of 98% with discharge potential up to 3.34 V at 200 mA g⁻¹. Remarkably, the battery maintained prominent rate capability with a round-trip efficiency of 72% even at a high current density of 1000 mA g⁻¹, demonstrating reversible conversion of Li₂O₂, Li₂CO₃ and Li₃N. These findings highlight the significance of ultra-strong electron push–pull effect and low transition barrier in photo-assisted Li–Air batteries.

TiO nanoflakes with {001} exposed facets have been successfully synthesized through a magnesiothermic reduction reaction. Used for separator modification, they exhibit excellent blocking and catalytic effects on the shuttle and conversion of LiPSs.

Lithium dendrite holey strategy for enabling a high-rate all-solid-state Ti ₃ C ₂ T _x fiber supercapacitor.

SnSe/SnSe ₂ heterojunction PEC photodetectors achieve enhanced responsivity via type-II band alignment for efficient charge separation.

A porous PEDOT:PSS network over Cu foil is developed as an anode host for dendrite-free Zn deposition, exhibiting outstanding plating/stripping behavior with a high DOD.

Sodium‐ion fiber supercapacitor (AFSIC) are promising candidates for wearable devices. However, their practical implementation is hindered by the absence of cathodes with fast Na‐ion diffusion kinetics to match the anode and the poor temperature adaptability of conventional electrolytes. To address these challenges, a carbon‐coated NaV ₃ O ₈ nanowires (NaNVO@C ₁₀ ) with low diffusion energy barriers of Na‐ion are designed, enabling rapid and reversible Na‐ion intercalation/de‐intercalation. By leveraging the liquid crystalline phase induced characteristic of graphene oxide (GO), NaNVO@C ₁₀ /rGO fiber cathode is fabricated using wet spinning. This fiber achieves a large volume capacitive of 565 F cm ⁻³ . In parallel, a novel dual co‐solvent electrolyte (SLPHNa) is developed by introducing sulfolane and ethylphosphate as co‐solvent. This electrolyte synergistically reshape the Na‐ion solvation sheath, thereby improving the cycle stability and enhancing temperature adaptability from −60 to 80 °C of AFSIC. The resulting NaNVO@C ₁₀ /rGO//MXene AFSIC exhibits a remarkable energy density of 35 mWh cm ⁻³ , and maintains 9.3 mWh cm ⁻³ even at −60 °C, along with an ultra‐long lifespan of 10 000 cycles under all‐weather condition. Moreover, the device maintains 82% of its initial capacitance after 1000 bending cycles, showing excellent mechanical durability. This work offers new insights into the development of high performance all‐weather sodium‐ion fiber supercapacitors.

Single-crystalline maricite phase NaNiPO₄ rod-like nanoparticles with high phase purity have been prepared for the first time. The obtained NaNiPO₄@C composite cathode displays a record discharge specific capacitance and excellent rate capacitance.