02226nas a2200217   4500008004100000022001400041245011300055210006900168260000800237300001100245490000800256520146900264653002701733653002501760653003001785653001501815653000901830100001701839700002201856856013001878       2021                        eng d  a0925-838800aMoSx surface-modified, hybrid core-shell structured LiFePO4 cathode for superior Li-ion battery applications0 aMoSx surfacemodified hybrid coreshell structured LiFePO4 cathode  cAUG  a1597180 v8723 a<p>A hybrid core-shell cathode, composed of MoSx shell and carbon-coated lithium iron phosphate core (MoSx@cLiFePO(4) or MoSx@c-LFP) is obtained by the post-annealing of a thermally decomposable ammonium thiomolybdate and commercial carbon-coated LiFePO4 (c-LFP) powder. The specific capacity of the commercially available amorphous carbon-coated LFP (c-LFP) is typically around 120-160 mAhg(-1), which is usually lower than the theoretical values similar to 170 mAhg(-1) due to the limited Li+ phase-boundary diffusion and low electrical conductivity. In the present investigation, we report that the specific capacity of surfacemodified (similar to 1.2 wt% of layered MoSx) c-LFP (MoSx@c-LFP) material can reach as high as similar to 228 mAhg(-1) delivering high gravimetric energy density similar to 750-770 Whkg(-1). The excess capacity can be attributed to the partial Li-ions intercalated/de-intercalated through the MoSx layers within a specific potential range (2.0-3.8 V). MoSx coating helps increase the c-LFP surface's stability by forming strong covalent bonding and is believed to enhance the electronic conduction by reducing the interparticle contact. During charge and discharge the hysteresis is substantially reduced by MoSx coating. The approach may open up a universal route to increase the cathode capacity, potentially attractive for further Li-ion battery research and industrial applications. (C) 2021 Elsevier B.V. All rights reserved.</p>10aAmmonium thiomolybdate10aCoulombic efficiency10aHybrid core-shell cathode10ahysteresis10aMoSx1 aHu, Lung-Hao1 aKumar, Pushpendra  uhttps://library.ncl.res.in/content/mosx-surface-modified-hybrid-core-shell-structured-lifepo4-cathode-superior-li-ion-battery02330nas a2200313   4500008004100000022001400041245013600055210006900191260000900260490000700269520122700276653002701503653002501530653002501555653002501580653002201605653002201627100001601649700002601665700002001691700002001711700003201731700002601763700002901789700001901818700002501837700002301862856013101885       2023                        eng d  a2352-152X00aExceptional cyclability of thermally stable PVdF-co-HFP/SiO<sub>2</sub> nanocomposite polymer electrolytes for sodium ion batteries0 aExceptional cyclability of thermally stable PVdFcoHFPSiOsub2sub   cDEC 0 v733 a<p>
	Thermally stable composite polymer electrolyte (CPE) devising PVdF-co-HFP polymer with in-situ generated silica (SiO2) as filler is synthesised via non-solvent- induced phase inversion technique. The filler loading of in-situ synthesised silica in PVdF-co-HFP is varied from 0 to 9 wt% and its morphological, thermal and electrochemical characterization is carried out. Among the different composite electrolytes, the PVdF-co-HFP containing 6 wt% SiO2 shows the uniform microporous structure with a highest porosity (84 %), surface area (784.14 m(2) g(-1)), electrolyte uptake (262 %) and electrolyte retention value (0.48). The incorporation of in-situ SiO2 on CPE shows not only the enhancement in thermal stability but also reduced thermal shrinkage with an increase in the filler content. The electrochemical studies of PVdF-co-HFP containing 6 wt% SiO2 shows a higher ionic conductivity (0.71 mS cm(-1)) and potential stability &gt;4.5 V verses Na/Na+. The Na-ion half-cells assembled with PVdF-co-HFP/SiO2 composite electrolyte show a specific capacity of similar to 120 mAh g(-1) at 0.3C rate in room temperature and a stable cycle performance with a Coulombic efficiency of around 100 % for 200 cycles.</p>
10aComposite electrolytes10aCoulombic efficiency10apolymer electrolytes10aSodium ion batteries10aspecific capacity10athermal stability1 aDas, Akhila1 aMelepurakkal, Amrutha1 aSreeram, Pranav1 aGireesh, K., T.1 aBalakrishnan, Neethu, T. M.1 aFatima, M., J. Jabeen1 aPullanchiyodan, Abhilash1 aAhn, Jou-Hyeon1 aShelke, Manjusha, V.1 aRaghavan, Prasanth  uhttps://library.ncl.res.in/content/exceptional-cyclability-thermally-stable-pvdf-co-hfpsio2-nanocomposite-polymer-electrolytes