02408nas a2200265   4500008004100000022001400041245013100055210006900186260000900255300001400264490000600278520151800284653001401802653001801816653002601834653001201860653002101872100001801893700001701911700002001928700002101948700002101969700002101990856013102011       2020                        eng d  a2196-021600aElectrochemical evaluation of the stability and capacity of r-GO-wrapped copper antimony chalcogenide anode for Li-ion battery0 aElectrochemical evaluation of the stability and capacity of rGOw  cAUG   a3291-33000 v73 a<p>Poor cycling stability and capacity fade are primary concerns for next-generation anode materials for Li-ion batteries. In non-carbonaceous anode materials, alloying with Li leads to volume increase that affects practical applications, and increase in particle size, amorphization and reduced conductivity can all lead to a loss of performance. In this work, binary antimony sulfide (Sb2S3) and ternary copper antimony sulfide (CuSbS2) are synthesized by a convenient solvothermal process. These materials are used to study the Li-active/inactive concept, by incorporating Cu into Sb(2)S(3)forming CuSbS(2)wherein Cu is Li inactive whereas Sb is Li active. By direct comparison, we have shown that incorporating Cu into binary antimony sulfide (Sb2S3) resulting into ternary copper antimony sulfide (CuSbS2) addresses the problem of poor conductivity and capacity loss, as Cu provides conductivity leading to enhanced charge transfer and prevents Sb particle aggregation while charge-discharge by exhibiting spectator or diluent ion effect. The better performance of CuSbS(2)is associated with the better Li(+)ion diffusion in the CuSbS2(D=8.97x10(-15) cm(2) s(-1)) compared to Sb2S3(D=2.76x10(-15) cm(2) s(-1)) and lower series resistance of CuSbS2(R=4.70x10(5) omega) compared to Sb2S3(R=5.81x10(8) omega). We have also investigated the composite with the addition of rGO. The CuSbS2-rGO delivered a reversible capacity of 672 mAh g(-1)after 1000 cycles at 200 mA g(-1)which has shown best performance.</p>
10aBatteries10achalcogenides10aDiffusion coefficient10alithium10aTernary sulfides1 aYadav, Poonam1 aSharma, Neha1 aPatrike, Apurva1 aSabri, Ylias, M.1 aJones, Lathe, A.1 aShelke, Manjusha  uhttps://library.ncl.res.in/content/electrochemical-evaluation-stability-and-capacity-r-go-wrapped-copper-antimony-chalcogenide01612nas a2200193   4500008004100000022001400041245015700055210006900212260000800281300001400289490000700303520086700310100001801177700001701195700002801212700002101240700002501261856013201286       2020                        eng d  a0887-062400aElectrospun nanofibers of Tin phosphide (SnP0.94) nanoparticles encapsulated in a carbon matrix: a tunable conversion-cum-alloying lithium storage anode0 aElectrospun nanofibers of Tin phosphide SnP094 nanoparticles enc  cJUN  a7648-76570 v343 a<p>Anodes with improved Li storage capability are required for next-generation lithium batteries. In this work we report a convenient synthesis strategy, based on electrospinning followed by reduction and phosphorization, to prepare a tin phosphide (SnP0.94) phase in a carbon nanofiber matrix. The layered structure offered by the SnP0.94 phase, along with its small size (5-20 nm) encapsulated in the conducting carbon matrix, leads to promising electrochemical Li storage characteristics. This composite has a capacity of 750 mAh g(-1) at 100 mA g(-1) with good cycling and rate stability. Electrochemical studies revealed a faster diffusion coefficient (1.86 x 10(-11) cm(2) s(-1)) for Li in the composite compared to the bare SnP0.94 (8.57 x 10(-14) cm(2) s(-1)), confirming the promise of this class of materials for cation storage in battery anodes.</p>
1 aYadav, Poonam1 aMalik, Wahid1 aDwivedi, Pravin, Kumari1 aJones, Lathe, A.1 aShelke, Manjusha, V.  uhttps://library.ncl.res.in/content/electrospun-nanofibers-tin-phosphide-snp094-nanoparticles-encapsulated-carbon-matrix-tunable