Phenolic resin-derived carbon-confined strategy: Sb2Se3@C@CNTs-600 with ultra-high pseudocapacitive contribution as a superior lithium-ion battery anode
With the advantage of high capacity, Sb2Se3 is one of the potential anodes for lithium-ion batteries. Unfortunately, due to the effects of the poor electronic conductivity and the huge volume changes associated with Sb2Se3, the application of Sb2Se3 in lithium-ion batteries is severely limited. Here...
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Veröffentlicht in: | Materials chemistry and physics 2023-01, Vol.293, p.126891, Article 126891 |
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Sprache: | eng |
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Zusammenfassung: | With the advantage of high capacity, Sb2Se3 is one of the potential anodes for lithium-ion batteries. Unfortunately, due to the effects of the poor electronic conductivity and the huge volume changes associated with Sb2Se3, the application of Sb2Se3 in lithium-ion batteries is severely limited. Herein, we designed a composite that Sb2Se3 nanoparticles were encapsulated by phenolic resin-derived carbon at a high temperature. The material (Sb2Se3@C@CNTs-600) has excellent lithium storage properties due to the synergy between the Sb2Se3 and carbon matrix. The intricate conductive structure guaranteed Sb2Se3@C@CNTs-600 excellent electrochemical properties with a reversible capacity of 580 mAh g−1 after 900 cycles at a current density of 1 A g−1. Additionally, the Sb2Se3@C@CNTs-600 electrode exhibits a fantastic rate capability delivering a reversible capacity of 440.5 mAh g−1 on average at 5 A g−1. Furthermore, benefit from the rational structural design, it delivers an ultra-high pseudocapacitive contribution of 93.93% at 1 mV s−1. The results proved that the phenolic resin-derived carbon can effectively mitigate the volume expansion of Sb2Se3 during the lithiation and delithiation processes, ensuing the cycling stability of the Sb2Se3@C@CNTs-600 and enhancing the lithium storage property and rate performance of the Sb2Se3@C@CNTs-600.
•Sb2Se3 nanoparticles were encapsulated by phenolic resin-derived carbon at a high temperature.•Sb2Se3@C@CNTs-600 has excellent lithium storage properties.•Sb2Se3@C@CNTs-600 possessed a reversible capacity of 440.5 mAh g−1 at the current density of 5 A g−1. |
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ISSN: | 0254-0584 1879-3312 |
DOI: | 10.1016/j.matchemphys.2022.126891 |