Cho, Yong Jae Kim, Chang Hyun Im, Hyung Soon Myung, Yoon Kim, Han Sung Back, Seung Hyuk Lim, Young Rok Jung, Chan Su Jang, Dong Myung Park, Jeunghee Lim, Sang Hoo Cha, Eun Hee Bae, Ki Yoon Song, Min Seob Il Cho, Won 2024-01-20T12:31:59Z 2024-01-20T12:31:59Z 2021-09-04 2013-05 1463-9076 https://pubs.kist.re.kr/handle/201004/128127 Germanium-tin (Ge1-xSnx) alloy nanocrystals were synthesized using a gas-phase laser photolysis reaction of tetramethyl germanium and tetramethyl tin. A composition tuning was achieved using the partial pressure of precursors in a closed reactor. For x < 0.1, cubic phase alloy nanocrystals were exclusively produced without separation of the tetragonal phase Sn metal. In the range of x = 0.1-0.4, unique Ge1-xSnx-Sn alloy-metal hetero-junction nanocrystals were synthesized, where the Sn metal domain becomes dominant with x. Thin graphitic carbon layers usually sheathed the nanocrystals. We investigated the composition-dependent electrochemical properties of these nanocrystals as anode materials of lithium ion batteries. Incorporation of Sn (x = 0.05) significantly increased the capacities (1010 mA h g(-1) after 50 cycles) and rate capabilities, which promises excellent electrode materials for the development of high-performance lithium batteries. English ROYAL SOC CHEMISTRY HIGH-CAPACITY ANODE MATERIAL GE1-XSNX ALLOYS GE NANOWIRES SN ALLOYS LI STORAGE NANOPARTICLES COMPOSITE NANOCOMPOSITE Germanium-tin alloy nanocrystals for high-performance lithium ion batteries Article 10.1039/c3cp51366a 1 PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.15, no.28, pp.11691 - 11695 PHYSICAL CHEMISTRY CHEMICAL PHYSICS 15 28 11691 11695 scie scopus 000321201500013 2-s2.0-84879858791 Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Article HIGH-CAPACITY ANODE MATERIAL GE1-XSNX ALLOYS GE NANOWIRES SN ALLOYS LI STORAGE NANOPARTICLES COMPOSITE NANOCOMPOSITE Ge-Sn nanocrystal laser-photo synthesis anode lithium ion battery