02139nas a2200193 4500008004100000245008500041210006900126260000800195300001200203490000600215520149500221100001801716700001801734700001501752700002201767700002501789700001901814856011201833 2024 eng d00aGlory of fire retardants in Li-ion batteries: could they be intrinsically safer?0 aGlory of fire retardants in Liion batteries could they be intrin cOCT a24002730 v83 a

Lithium-ion batteries (LIBs) have dramatically transformed modern energy storage, powering a wide range of devices from portable electronics to electric vehicles, yet the use of flammable liquid electrolytes raises thermal safety concerns. Researchers have investigated several ways to enhance LIB's fire resistance. Fire retarding molecules functions through cooling effects, scavenging radicals, and forming protective barriers. Incorporating fire-suppressing molecules within the LIBs aims to delay or mitigate thermal runaway scenarios, reducing the risks of fires or explosions. Achieving an optimal balance between safety and performance is a major obstacle in the design of intrinsically safer LIBs. Therefore, it is important to consider their effects on LIB's performance, long-term stability, and environmental impact. To overcome these challenges, collaborative research efforts among academia, industry, and regulatory sectors are necessary. This article reviews state-of-the-art literature associated with LIBs safety or even fire mitigation by introducing solid-state or quasi-solid-state electrolytes as well as modified liquid electrolytes. Moreover, the effectiveness of various strategies in making LIBs intrinsically safer is critically evaluated with an emphasis on fire retardants followed by shedding some light on the remaining challenges.

1 aMishra, Rajat1 aAnne, Mounika1 aDas, Sayan1 aChavva, Tarunikaa1 aShelke, Manjusha, V.1 aPol, Vilas, G. uhttps://library.ncl.res.in/content/glory-fire-retardants-li-ion-batteries-could-they-be-intrinsically-safer02635nas a2200289 4500008004100000022001400041245010600055210006900161260000800230490000700238520166300245653001401908653003401922653001801956653002701974653002302001653002102024100001802045700002202063700001702085700001902102700003602121700001902157700001802176700002102194856013002215 2024 eng d a2468-519400aWide temperature enhanced sodium storage in tailored, sustainable sodiophilic biphasic N-doped carbon0 aWide temperature enhanced sodium storage in tailored sustainable cAPR0 v373 a

Alternative to Li-ion batteries(LIB), Na-ion batteries (NIB) and Na metal batteries (NMB) are gaining significant attention due to their low cost, abundance, and safety. By modulating microstructural properties such as graphitization, heteroatom doping, surface-rich functional groups, and interlayer d-spacing, Na-ion storage in NIB and Na plating/striping in NMB can be ameliorated. This study reports sodiophilic N-doped polymer-derived carbon (PDC) as an anode for NIB and host for Na metal in NMB. As NIB anode, PDC provides a storage capacity of 173 mAh g- 1 at 1 A g- 1 in half-cell and 84 mAh g- 1 at 1C (1C = 128 mAhg- 1) in full-cell with Na3V2(PO4)2F3 (NVPF) cathode. As Na metal anode (NMA) host, a high columbic efficiency (C.E.) of 99.45% for over 1000 cycles at 6 mA cm- 2_4 mAh cm-2 is obtained. Furthermore, fascinating wide temperature (50 degrees C and -20 degrees C) sodiumion storage is successfully demonstrated by PDC. Advanced X-ray photoelectron spectroscopy (XPS) confirmed the formation of stable and uniform solid electrolyte interphase (SEI) composed of inorganic and organic components, X-ray microtomography confirmed uniform Na plating throughout the volume of the electrode analogous to Brunauer-Emmett-Teller (BET) surface area, Raman spectroscopy, X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) results. A sustainable and scalable promising biphasic NIB anode and sodiophilic host for Na metal was possible due to larger d-spacing, partial graphitization, high mesoporosity, N-doping, presence of surface functional groups, better charge transfer, and diffusion properties.

10aFull-cell10aLow and elevated temperatures10aNa metal host10aPolymer-derived carbon10aSodium-ion battery10aX-ray tomography1 aYadav, Poonam1 aDas, Anoushka, K.1 aTorris, Arun1 aWasnik, Kundan1 aKoppisetti, Heramba, Venkata Sa1 aPol, Vilas, G.1 aShelke, Vilas1 aShelke, Manjusha uhttps://library.ncl.res.in/content/wide-temperature-enhanced-sodium-storage-tailored-sustainable-sodiophilic-biphasic-n-doped01684nas a2200181 4500008004100000022001400041245009900055210006900154260000900223300000800232490000600240520104700246100001801293700002101311700002101332700001901353856013001372 2025 eng d a2399-366900aEvaluating sodium-ion pouch cell battery for renewable energy storage under extreme conditions0 aEvaluating sodiumion pouch cell battery for renewable energy sto cOCT  a3150 v83 a

A sodium-ion battery (SIB) is a sustainable energy storage technology based on abundantly available raw materials. It is a commercially viable option because of the processing similarity with Li-ion battery. Most of the energy storage studies focus on the near room temperature performance of different battery chemistries. Herein, we report the ultralow temperature performance of the SIB pouch cell. The cells fabricated using low-temperature compatible components showed significant specific energy values around 96, 74, and 46 Wh kg-1 at room temperature, -25 degrees C, and -50 degrees C, respectively. We demonstrated the battery performance under laboratory conditions as well as under actual windy and snowy environments. Such an exhibition highlights the use case of the SIB pouch cell as an emergency energy storage device in extreme weather conditions. Moreover, charging of SIB cell at -100 degrees C using polycrystalline Si solar cell is also reported, indicating the possibility of deployment for space expeditions.

1 aShelke, Mehul1 aBoyer, Jamee, M.1 aMirzapure, Vinay1 aPol, Vilas, G. uhttps://library.ncl.res.in/content/evaluating-sodium-ion-pouch-cell-battery-renewable-energy-storage-under-extreme-conditions02655nas a2200277 4500008004100000022001400041245013400055210006900189260000800258490000600266520167900272653002101951653003901972653001402011653002602025653002402051100001702075700002102092700001602113700003602129700001902165700002302184700002102207700001902228856013002247 2025 eng d a2366-960800aInsights into electrolyte-solvent interactions and SEI formation for sustainable sodium-ion battery operation at low temperatures0 aInsights into electrolytesolvent interactions and SEI formation  cSEP0 v93 a

Sodium-ion batteries (SIBs) show promise as an alternative to lithium-ion batteries. However, they face performance challenges at ultra-low temperatures (<-40 degrees C) due to slow Na+ transfer kinetics with conventional electrolytes. This limitation restricts their use in extreme environments such as polar regions and outer space. The presented systematic study addresses this challenge by modulating and tailoring the electrolyte composition for SIBs, enabling ultra-low temperature operation down to -110 degrees C for the first time. The comprehensive molecular dynamic and density functional theory calculations combined with experimental Raman spectroscopy and nuclear magnetic resonance studies of advanced electrolytes provided a deeper mechanistic understanding of the solvation structures and their impact on electrochemical performance. By varying the solvent composition with a combination of tetrahydrofuran and 2-Methyltetrahydrofuran solvents and sodium hexafluorophosphate (NaPF6) salt, the freezing point, solubility, and Na+ solvation structure of the electrolyte is modulated and studied in detail. The extensive anion engagement in the optimized mix solvent electrolyte facilitated the formation of a stable and inorganic-rich solid electrolyte interphase layer, ensuring low overpotentials and uniform Na+ deposition, yielding superior cycling stability. As a result, the developed electrolyte enables SIBs to achieve reversible capacities of 88 mAh g(-1) at -60 degrees C and 50 mAh g(-1) at -100 degrees C. These insights may contribute to developing improved energy storage devices suitable for challenging environmental conditions.

10acontact-ion pair10asolid electrolyte interphase (SEI)10asolvation10aultra-low temperature10aXPS-depth Profiling1 aKim, Soohwan1 aMirzapure, Vinay1 aAtwi, Rasha1 aKoppisetti, Heramba, V. S. R. M1 aWasnik, Kundan1 aRajput, Nav, Nidhi1 aShelke, Manjusha1 aPol, Vilas, G. uhttps://library.ncl.res.in/content/insights-electrolyte-solvent-interactions-and-sei-formation-sustainable-sodium-ion-battery