2022
DOI: 10.1002/advs.202104531
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Hierarchical Sulfide‐Rich Modification Layer on SiO/C Anode for Low‐Temperature Li‐Ion Batteries

Abstract: The silicon oxide/graphite (SiO/C) composite anode represents one of the promising candidates for next generation Li-ion batteries over 400 Wh kg −1 . However, the rapid capacity decay and potential safety risks at low temperature restrict their widely practical applications. Herein, the fabrication of sulfide-rich solid electrolyte interface (SEI) layer on surface of SiO/C anode to boost the reversible Li-storage performance at low temperature is reported. Different from the traditional SEI layer, the present… Show more

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Cited by 26 publications
(19 citation statements)
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“…The SEI film of SiO@C-1 (Figures 5a and S11) is extremely thick and heterogeneous with an average thickness of ∼85 nm, demonstrating that the electrolyte is continuously decomposed at the electrode interface. 47 By contrast, the average SEI film thicknesses of the SiO@C-2 and SiO@C-3 electrodes are only ∼16 and ∼9 nm (Figures 5c,e and S12), respectively, which are much thinner than that of SiO@C-1. Moreover, the carbon layer of the SiO@C-2 and SiO@C-3 electrodes can be observed in the HRTEM images (Figure S12), indicating the thin SEI film and relatively intact structure.…”
Section: Resultsmentioning
confidence: 90%
See 1 more Smart Citation
“…The SEI film of SiO@C-1 (Figures 5a and S11) is extremely thick and heterogeneous with an average thickness of ∼85 nm, demonstrating that the electrolyte is continuously decomposed at the electrode interface. 47 By contrast, the average SEI film thicknesses of the SiO@C-2 and SiO@C-3 electrodes are only ∼16 and ∼9 nm (Figures 5c,e and S12), respectively, which are much thinner than that of SiO@C-1. Moreover, the carbon layer of the SiO@C-2 and SiO@C-3 electrodes can be observed in the HRTEM images (Figure S12), indicating the thin SEI film and relatively intact structure.…”
Section: Resultsmentioning
confidence: 90%
“…Figure shows the morphology of the SEI film of the single SiO particle for the three electrodes after 200 cycles. The SEI film of SiO@C-1 (Figures a and S11) is extremely thick and heterogeneous with an average thickness of ∼85 nm, demonstrating that the electrolyte is continuously decomposed at the electrode interface . By contrast, the average SEI film thicknesses of the SiO@C-2 and SiO@C-3 electrodes are only ∼16 and ∼9 nm (Figures c,e and S12), respectively, which are much thinner than that of SiO@C-1.…”
Section: Resultsmentioning
confidence: 99%
“…Although the slow desolvation process greatly hinders the transfer process of Li ions at the interface, a few reports on accelerating the desolvation process of lithium ions by forming artificial SEIs with electrolyte additives exist at present. Liu et al 86 constructed sulfide-containing SEI layers on silicon-based anodes to accelerate Li + desolvation (Fig. 5f).…”
Section: Strategies For Surface/interface Modification In Low-tempera...mentioning
confidence: 99%
“…Secondly, suitable SEI film can also significantly improve battery performance at low temperatures. X. Liu et al presented a novel strategy to create a more stable interface between the electrolyte and electrode by constructing a sulfuric acid-containing SEI layer on top of a silicon-based anode to achieve a SiO/C anode with high performance at low temperatures [35]. The SiO/C composite anode was modified with an electrolyte containing organic-inorganic hybrid components during initial discharge.…”
Section: Sei Filmmentioning
confidence: 99%