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Integrated Design of Hierarchical CoSnO3@NC@MnO@NC Nanobox as Anode Material for Enhanced Lithium Storage Performance
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Vise andre og tillknytning
2020 (engelsk)Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 12, nr 17, s. 19768-19777Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Transition-metal oxides (TMOs) are potential candidates for anode materials of lithium-ion batteries (LIBs) due to their high theoretical capacity (similar to 1000 mA h/g) and enhanced safety from suppressing the formation of lithium dendrites. However, the poor electron conductivity and the large volume expansion during lithiation/delithiation processes are still the main hurdles for the practical usage of TMOs as anode materials. In this work, the CoSnO3@NC@ MnO@NC hierarchical nanobox (CNMN) is then proposed and fabricated to solve those issues. The as-prepared nanobox contains hollow cubic CoSnO3 as a core and dual N-doped carbon-"sandwiched" MnO particles as a shell. As anode materials of LIBs, the hollow and carbon interlayer structures effectively accommodate the volume expansion while dual active TMOs of CoSnO3 and Notably, the dual-layer structure of N-doped carbons plays a critical functional role MnO efficiently increase the specific capacity. in the incorporated composites, where the inner layer serves as a reaction substrate and a spatial barrier and the outer layer offers electron conductivity, enabling more effective involvement of active anode materials in lithium storage, as well as maintaining their high activity during lithium cycling. Subsequently, the as-prepared CNMN exhibits a high specific capacity of 1195 mA h/g after the 200th cycle at 0.1C and an excellent stable reversible capacity of about 876 mA h/g after the 300th cycle at 0.5C with only 0.07 mA h/g fade per cycle after 300 cycles. Even after a 250 times fast charging/discharging cycle both at SC, it still retains a reversible capacity of 422.6 mA h/g. We ascribe the enhanced lithium storage performances to the novel hierarchical architectures achieved from the rational design.

sted, utgiver, år, opplag, sider
AMER CHEMICAL SOC , 2020. Vol. 12, nr 17, s. 19768-19777
Emneord [en]
transition-metal oxides; carbonaceous layer; anode materials; hierarchical nanobox; lithium storage
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-165943DOI: 10.1021/acsami.9b22368ISI: 000529924800056PubMedID: 32255602OAI: oai:DiVA.org:liu-165943DiVA, id: diva2:1435122
Merknad

Funding Agencies|Natural Science Foundation of ShanghaiNatural Science Foundation of Shanghai [17ZR1410500, 19ZR1418100]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [21601120, 11428410, 11375111]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM) (VR) [5.1-2015-5959]; Swedish Foundation for Strategic Research (SSF)Swedish Foundation for Strategic Research [SM17-0026]

Tilgjengelig fra: 2020-06-04 Laget: 2020-06-04 Sist oppdatert: 2021-10-13

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