Lim, Young Rok Im, Hyung Soon Cho, Yong Jae Park, Jeunghee Cha, Eun Hee Cho, Won Il 2024-01-20T08:32:26Z 2024-01-20T08:32:26Z 2021-09-05 2014-11 2046-2069 https://pubs.kist.re.kr/handle/201004/126163 Germanium-or tin-based nanostructures have recently demonstrated outstanding lithium ion storage ability and are considered to be the most promising candidates to substitute current carbonaceous anodes in lithium ion batteries. Tin germanium sulfide (SnxGe1-xS) ternary alloy nanocrystals (NCs) were synthesized by a gas-phase laser photolysis reaction with complete composition control (0 <= x <= 1). All of these composition-tuned nanocrystals showed excellent cycling performances in lithium ion batteries. Reversible capacities were in the range 800-1200 mA h g(-1) after 70 cycles, which is close to the theoretical capacities of each composition. As the tin composition (x) was increased, the rate capability greatly enhanced. This unique composition dependence of the electrochemical properties was explained by the lower charge transfer resistance due to the high conductivity of SnxGe1-xS NCs as well as the SnxGe1-x alloy NCs produced upon lithiation. Sn-rich SnxGe1-xS NCs are, therefore, promising candidates for applications in high-performance energy conversion systems. English ROYAL SOC CHEMISTRY ANODE MATERIALS GERMANIUM TIN GRAPHENE NANOCOMPOSITES CAPACITY SNS PHOTODETECTORS NANORIBBONS NANOSHEETS Composition-tuned SnxGe1-xS nanocrystals for enhanced-performance lithium ion batteries Article 10.1039/c4ra08886g 1 RSC ADVANCES, v.4, no.104, pp.60058 - 60063 RSC ADVANCES 4 104 60058 60063 scie scopus 000345654000052 2-s2.0-84912115118 Chemistry, Multidisciplinary Chemistry Article ANODE MATERIALS GERMANIUM TIN GRAPHENE NANOCOMPOSITES CAPACITY SNS PHOTODETECTORS NANORIBBONS NANOSHEETS SnGeS nanocrystal anode lithium ion batteries