02025nas a2200181 4500008004100000022001400041245015500055210006900210260000900279300001600288490000700304520131500311100002201626700002201648700002201670700002101692856013001713 2025 eng d a2040-336400aA carbon nanotube wrapped Na3V2(PO4)2F3 cathode with a dual cation electrolyte: enhancing high-voltage stability and cyclability in zinc-ion batteries0 acarbon nanotube wrapped Na3V2PO42F3 cathode with a dual cation e cNOV  a25631-256420 v173 a

Aqueous zinc-ion batteries (ZIBs) offer several compelling advantages as a safer and sustainable energy storage system. Polyanion-based cathodes, characterized by their comparatively higher voltage and structural stability, are promising for ZIBs. However, challenges hinder their practical applications, such as inferior rate capability and limited cycling stability. In this study, we constructed a carbon nanotube wrapped Na3V2(PO4)2F3 (NVPF-CNT) cathode integrated with a highly concentrated dual cation electrolyte (DCE) to enhance the electrochemical performance of ZIBs by enabling a synergistic Na+ and Zn2+ co-insertion mechanism. The DCE effectively regulates the solvation structure, stabilizes the solid electrolyte interface (SEI), minimizes free water molecules, thereby widening the electrochemical window and reducing the side reactions, and inhibits cathode dissolution. Consequently, the CNT-wrapped NVPF cathode exhibits an initial reversible capacity of 131.3 mAh g-1 at 0.05 A g-1, and retains 84% of its capacity over 500 cycles at 1 A g-1, with a nominal voltage of similar to 1.5 V. This approach offers valuable insights into the potential of CNT-wrapped NVPF cathodes in combination with a DCE while providing a comprehensive framework for advancing high-performance ZIBs.

1 aPandey, Priyanshi1 aShivade, Rajkiran1 aDeshmukh, Ashvini1 aShelke, Manjusha uhttps://library.ncl.res.in/content/carbon-nanotube-wrapped-na3v2po42f3-cathode-dual-cation-electrolyte-enhancing-high-voltage01922nas a2200205 4500008004100000022001400041245010700055210006900162260000900231300001100240490000800251520117900259653003301438653002801471653002101499100002601520700002201546700002501568856012301593 2025 eng d a0378-775300aEnhanced oxygen electrocatalysis in zinc-air batteries via a bifunctional bimetallic organic framework0 aEnhanced oxygen electrocatalysis in zincair batteries via a bifu cDEC  a2384650 v6593 a

An efficient bifunctional oxygen electrocatalyst, a nickel-iron metal organic framework (NF-MOF) grown within three-dimensional (3D) nitrogen doped porous carbon (NPC) collectively referred as NF-MOF@NPC, is developed as high performance electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The synergistic effect of bimetallic active sites coupled with conductive nitrogen doped porous carbon matrix, provides chemical stability, abundant active sites, enhanced electron transfer, and improve catalytic activity. NFMOF@NPC exhibits OER onset potential of 1.60 V at current density of 10 mA cm- 2 with Tafel slope of 126 mV dec- 1 and ORR half wave potential of 0.81 V with electron transfer number of 3.91. A zinc-air battery fabricated using NF-MOF@NPC shows peak power density of 102 mW cm-2 and specific capacity of 741 mAh g-Z 1n. It also exhibits remarkable cycling stability for 120 h at current density of 10 mA cm- 2 highlighting its promise as alternative for conventional platinum on carbon (Pt/C) and ruthenium dioxide (RuO2) electrocatalysts demonstrating its potential for next generation energy storage devices.

10aBifunctional Electrocatalyst10aRotating disk electrode10azinc-air battery1 aShivade, Rajkiran, D.1 aPandey, Priyanshi1 aShelke, Manjusha, V. uhttps://library.ncl.res.in/content/enhanced-oxygen-electrocatalysis-zinc-air-batteries-bifunctional-bimetallic-organic02305nas a2200349 4500008004100000022001400041245011900055210006900174260000900243490000700252520118800259653000901447653002301456653001301479653002601492653002001518100001701538700002201555700002201577700001901599700001801618700001801636700002801654700002401682700002101706700002001727700002001747700001701767700002501784700001801809856012801827 2025 eng d a1613-681000aZincke-derived viologen covalent organic framework as a high-performance cathode for aqueous zinc-iodine batteries0 aZinckederived viologen covalent organic framework as a highperfo cDEC 0 v213 a

Aqueous zinc-iodine (Zn-I2) batteries are among the most promising energy storage technologies, offering high energy density, low cost, and intrinsic safety. However, their practical deployment is hindered by the polyiodide shuttle effect, leading to rapid capacity fading and poor cycling performance. This work demonstrates the application of a crystalline viologen-based covalent organic framework (TAB-DNP-BP COF), synthesized via a one-pot Zincke reaction, as an efficient iodine host material. The cationic backbone of the TAB-DNP-BP COF effectively confines iodine (I2) species and electrostatically traps polyiodides, suppressing their migration and protecting the zinc anode. Zinc-iodine batteries assembled with an I2-enriched TAB-DNP-BP COF (TAB-DNP-BP COF@I2) cathode deliver a high specific capacity of 337 mAh g-1 at 0.5 C, surpassing the performance of most reported COF-, MOF-, and cage-based systems, while exhibiting excellent cycling stability over 5000 cycles. This work highlights the potential of ionic COFs for stabilizing iodine chemistry and offers a promising strategy toward the development of high-performance, durable aqueous Zn-I2 batteries.

10aiCOF10aiodine confinement10aviologen10azinc-iodine batteries10aZincke reaction1 aDas, Gobinda1 aShivade, Rajkiran1 aPandey, Priyanshi1 aVarghese, Sabu1 aRajput, Nitul1 aMatouk, Zineb1 aMartinez, Jose, Ignacio1 aStraubinger, Rainer1 aBenyettou, Farah1 aGandara, Felipe1 aOlson, Mark, A.1 aAouad, Samer1 aShelke, Manjusha, V.1 aTrabolsi, Ali uhttps://library.ncl.res.in/content/zincke-derived-viologen-covalent-organic-framework-high-performance-cathode-aqueous-zinc02418nas a2200241 4500008004100000022001400041245010900055210006900164260000900233300001100242490000800253520160500261653002101866653002101887653002601908653001001934653002101944653001601965100002501981700002202006700002102028856012702049 2026 eng d a2352-152X00aMolecularly engineered PW12@Polypyrrole/MXene composite for high-energy, high-rate lithium-ion capacitor0 aMolecularly engineered PW12PolypyrroleMXene composite for highen cFEB  a1201650 v1483 a

Due to inherent differences in the charge storage mechanisms of anode and cathode in a hybrid lithium-ion capacitor (LIC), a significant kinetic balance exists, necessitating the need to improve the ion/electron transfer capability of anode materials. In this study, we have developed a ternary pseudocapacitive composite comprising redox-active phosphotungstic acid nanoclusters (PW12) anchored to polypyrrole nanofibers (PPy), which are further decorated with Ti3C2Tx MXene (PW12@PPy/Ti3C2Tx) synthesized via an in-situ polymerization strategy. Here, Ti3C2Tx MXene serves as a conductive scaffold for PW12 wrapped PPy nanofibers, promoting efficient electron/ion transport. Simultaneously, the incorporation of PW12-anchored PPy nanofibers effectively mitigates the natural tendency of MXene to restack, thus preserving its layered structure. The PW12@PPy/Ti3C2Tx hybrid composite material delivers a high specific capacity of 767 mAh g-1 at 0.1 A g-1 after 100 cycles and a promising cycling stability of 280 mAh g-1 at 1 A g-1 up to 600 cycles. Moreover, an assembled LIC device using PW12@PPy/Ti3C2Tx as anode with nitrogen-doped sucrose carbon (NSC) as cathode demonstrates the highest energy density of 125 Wh kg-1 and maximum power density of 17,058 W kg-1. The device also maintains good cycling stability of 78.4 % capacity retention after 10,000 cycles at 1 A g-1. These results highlight a promising pathway for designing MXene-based hybrid composites with enhanced lithium storage performance, effectively addressing the kinetic mismatch challenges in LIC anode applications.

10aFull cell device10aLi ion diffusion10aLithium-ion capacitor10aMXene10apolyoxometalates10apolypyrrole1 aPawar, Meenakshi, D.1 aPandey, Priyanshi1 aShelke, Manjusha uhttps://library.ncl.res.in/content/molecularly-engineered-pw12polypyrrolemxene-composite-high-energy-high-rate-lithium-ion