02415nas a2200301 4500008004100000022001400041245011600055210006900171260000800240300001200248490000700260520140900267653002801676653002501704653002601729653002001755653002501775100002701800700001701827700001801844700001701862700001901879700002101898700001901919700002401938700002401962856012701986 2020 eng d a1613-681000aIn situ cross-linked nonaqueous polymer electrolyte for zinc-metal polymer batteries and hybrid supercapacitors0 aIn situ crosslinked nonaqueous polymer electrolyte for zincmetal cSEP a20025280 v163 a

This work reports the facile synthesis of nonaqueous zinc-ion conducting polymer electrolyte (ZIP) membranes using an ultraviolet (UV)-light-induced photopolymerization technique, with room temperature (RT) ionic conductivity values in the order of 10(-3)S cm(-1). The ZIP membranes demonstrate excellent physicochemical and electrochemical properties, including an electrochemical stability window of >2.4 V versus Zn|Zn(2+)and dendrite-free plating/stripping processes in symmetric Zn||Zn cells. Besides, a UV-polymerization-assisted in situ process is developed to produce ZIP (abbreviated i-ZIP), which is adopted for the first time to fabricate a nonaqueous zinc-metal polymer battery (ZMPB; VOPO4|i-ZIP|Zn) and zinc-metal hybrid polymer supercapacitor (ZMPS; activated carbon|i-ZIP|Zn) cells. The VOPO(4)cathode employed in ZMPB possesses a layered morphology, exhibiting a high average operating voltage of approximate to 1.2 V. As compared to the conventional polymer cell assembling approach using the ex situ process, the in situ process is simple and it enhances the overall electrochemical performance, which enables the widespread intrusion of ZMPBs and ZMPSs into the application domain. Indeed, considering the promising aspects of the proposed ZIP and its easy processability, this work opens up a new direction for the emergence of the zinc-based energy storage technologies.

10anonaqueous electrolytes10apolymer electrolytes10apostlithium batteries10aSupercapacitors10azinc-metal batteries1 aVijayakumar, Vidyanand1 aGhosh, Meena1 aKurian, Maria1 aTorris, Arun1 aDilwale, Swati1 aBadiger, Manohar1 aWinter, Martin1 aNair, Jijeesh, Ravi1 aKurungot, Sreekumar uhttp://library.ncl.res.in/content/situ-cross-linked-nonaqueous-polymer-electrolyte-zinc-metal-polymer-batteries-and-hybrid02148nas a2200241 4500008004100000022001400041245011900055210006900174260000900243300001600252490000700268520127900275653002301554653003201577653002801609653002501637653003001662100001701692700001901709700002701728700002401755856012701779 2020 eng d a1944-824400aScalable synthesis of manganese-doped hydrated vanadium oxide as a cathode material for aqueous zinc-metal battery0 aScalable synthesis of manganesedoped hydrated vanadium oxide as  cOCT  a48542-485520 v123 a

Rechargeable aqueous zinc-metal batteries (ZMBs) are considered as potential energy storage devices for stationary applications. Despite the significant developments in recent years, the performance of ZMBs is still limited due to the lack of advanced cathode materials delivering high capacity and long cycle life. In this work, we report a low-temperature and scalable synthesis method following a surfactant-assisted route for preparing manganese-doped hydrated vanadium oxide (MnHVO-30) and its application as the cathode material for ZMB. The as-prepared material possesses a porous architecture and expanded interlayer spacing. Therefore, the MnHVO-30 cathode offers fast and reversible insertion of Zn2+ ions during the charge/discharge process and delivers 341 mAh g(-1) capacity at 0.1 A g(-1). Moreover, the MnHVO-30 parallel to Zn cell retains 82% of its initial capacity over 1200 stability cycles, which is higher compared to that of the undoped system. Besides, a quasi-solid-state home-made pouch cell with an area of 3.3 x 1.6 cm(2) and 3.6 mg cm(-2) loading is assembled, achieving 115 mAh g(-1) capacity over 100 stability cycles. Therefore, this work provides an easy and attractive way for preparing efficient cathode materials for aqueous ZMBs.

10aanionic surfactant10ahydrated vanadium pentoxide10aNafion ionomer membrane10apost-lithium battery10aquasi-solid-state battery1 aGhosh, Meena1 aDilwale, Swati1 aVijayakumar, Vidyanand1 aKurungot, Sreekumar uhttp://library.ncl.res.in/content/scalable-synthesis-manganese-doped-hydrated-vanadium-oxide-cathode-material-aqueous-zinc02135nas a2200193 4500008004100000022001400041245009500055210006900150260000900219300001400228490000700242520146600249100001701715700002701732700001801759700001901777700002401796856012101820 2021 eng d a1477-922600aNaphthalene dianhydride organic anode for a `rocking-chair' zinc-proton hybrid ion battery0 aNaphthalene dianhydride organic anode for a rockingchair zincpro cMAR  a4237-42430 v503 a

Rechargeable batteries consisting of a Zn metal anode and a suitable cathode coupled with a Zn2+ ion-conducting electrolyte are recently emerging as promising energy storage devices for stationary applications. However, the formation of high surface area Zn (HSAZ) architectures on the metallic Zn anode deteriorates their performance upon prolonged cycling. In this work, we demonstrate the application of 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA), an organic compound, as a replacement for the Zn-metal anode enabling the design of a `rocking-chair' zinc-proton hybrid ion battery. The NTCDA electrode material displays a multi-plateau redox behaviour, delivering a specific discharge capacity of 143 mA h g(-1) in the potential window of 1.4 V to 0.3 V vs. Zn|Zn2+. The detailed electrochemical characterization of NTCDA in various electrolytes (an aqueous solution of 1 M ZnOTF, an aqueous solution of 0.01 M H2SO4, and an organic electrolyte of 0.5 M ZnOTF/acetonitrile) reveals that the redox processes leading to charge storage involve a contribution from both H+ and Zn2+. The performance of NTCDA as an anode is further demonstrated by pairing it with a MnO2 cathode, and the resulting MnO2||NTCDA full-cell (zinc-proton hybrid ion battery) delivers a specific discharge capacity of 41 mA h g(total)(-1) (normalized with the total mass-loading of both anode and cathode active materials) with an average operating voltage of 0.80 V.

1 aGhosh, Meena1 aVijayakumar, Vidyanand1 aKurian, Maria1 aDilwale, Swati1 aKurungot, Sreekumar uhttp://library.ncl.res.in/content/naphthalene-dianhydride-organic-anode-rocking-chair-zinc-proton-hybrid-ion-battery02439nas a2200181 4500008004100000022001400041245014900055210006900204260000900273300001400282490000700296520173700303100001902040700001702059700002702076700002402103856013002127 2022 eng d a0887-062400aElectrodeposited layered sodium vanadyl phosphate (NaxVOPO4 center dot nH(2)O) as cathode material for aqueous rechargeable zinc metal batteries0 aElectrodeposited layered sodium vanadyl phosphate NaxVOPO4 cente cJUN  a6520-65310 v363 a

Aqueous rechargeable zinc metal batteries (ARZMBs) present a safer and cost-effective solution for energy storage in stationary applications. However, a major challenge is the lack of suitable cathode materials simultaneously exhibiting high operating voltage and long cycling stability. Herein, we report the polyanionic sodium-intercalated layered vanadyl phosphate [NaxVOPO4 center dot nH(2)O (NVP)] as a suitable high-voltage and stable cathode for ARZMBs. This work employs a simpler electrochemical route (electrodeposition) for the synthesis of NVP over functionalized carbon fiber substrates and its application as a binder-free cathode in ARZMBs. The electrodeposited NVP possesses a morphology of vertically aligned well-separated nanosheet bundles resembling a flower. When used as the ARZMB cathode, the NVP electrode delivers a specific discharge capacity of 100 mA h g(-1) at 0.033 A g(-1) and high cycling stability (98% retention of the initial capacity over 1100 cycles at 0.333 A g(-1)) in a mild aqueous electrolyte with moderate zinc salt concentration. The observed electrochemical performance of NVP is credited to the synergistic effect of unique nanoflower morphology, the pillaring effect offered by the intercalated Na, and the intimate contact of the active material with the carbon fiber network. These factors are favorable for enhancing the transport of the electrolyte ions and electrons and maintaining the structural stability of the electrode during long-term cycling. The NVP electrode could also deliver appreciable performance (a discharge capacity of 73 mA h g(-) 1 and a current density of 0.033 A g(-1)) in quasi-solidstate ARZMB cells employing PVA/Zn(CF3SO3)(2) gel electrolyte.

1 aDilwale, Swati1 aGhosh, Meena1 aVijayakumar, Vidyanand1 aKurungot, Sreekumar uhttp://library.ncl.res.in/content/electrodeposited-layered-sodium-vanadyl-phosphate-naxvopo4-center-dot-nh2o-cathode-material02281nas a2200253 4500008004100000022001400041245009700055210006900152260000800221490000600229520140600235653002501641653002301666653001801689653002901707653003301736100001901769700001701788700004001805700001801845700001701863700002401880856012301904 2023 eng d a2366-748600aBinder-free and flexible VOPO4/CNT film as cathode for aqueous rechargeable Zn-metal battery0 aBinderfree and flexible VOPO4CNT film as cathode for aqueous rec cSEP0 v73 a

Aqueous rechargeable Zn-metal batteries (AZMBs) are promising energy storage aids due to their inherent safety, low cost, and competent performance, with prospects in stationary and portable applications. In this regard, one of the critical requirements is developing electrodes that can adapt to mechanical deformation without compromising the charge storage performance. The current work demonstrates the development of a binder-free and mechanically flexible composite cathode film (VP/fCNT-F, where `F' stands for the film) based on VOPO4 (VP) and functionalized carbon nanotubes (fCNTs). The VP/fCNT-F film processing involves simple vacuum filtration of the composite obtained from the in-situ reaction of the fCNTs and the VP precursor in an aqueous medium. The functionalization of carbon nanotube (CNT) is important for the homogenous dispersion of VP and fCNT. The VP/fCNT-F electrode is used as a monolithic electrode in AZMB cells in combination with both liquid and quasi-solid-state gel polymer electrolytes. Besides, the utility of the VP/fCNT-F electrode in a flexible battery configuration is also demonstrated. Interestingly, in both the coin-cell and flexible configurations, the VP/fCNT-F electrode delivers a comparable discharge capacity of 90 and 78 mAh g(-1), respectively (at 0.1 A g(-1)), validating the advantage of the binder-free VP/fCNT-F electrode for AZMBs.

10abinder-free cathodes10aflexible batteries10alayered VOPO410apolymer gel electrolytes10aself-standing flexible films1 aDilwale, Swati1 aBabu, Athira1 aPuthiyaveetil, Priyanka, Pandinhare1 aKurian, Maria1 aGhosh, Meena1 aKurungot, Sreekumar uhttp://library.ncl.res.in/content/binder-free-and-flexible-vopo4cnt-film-cathode-aqueous-rechargeable-zn-metal-battery