Reduced graphene oxide (rGO) integrated sodium titanate nanocomposite as a high-rate performance anode material for sodium ion batteries

Chandel, Sakshee; Zulkifli, .; Singh, Jay; Kim, Jaekook; Kumar, Alok

doi:10.1016/j.jelechem.2023.117485

“…[11][12][13] In response, many researchers are dedicated to addressing these issues with little success. For example, modulating morphology neglects the intrinsic conductivity, [14,15] surface coating cannot improve reaction kinetics, [16,17] and hybridized structures are inappropriate for industrial scale-up for high costs. [9,18] The heteroelement doping strategy is an effective method for fundamentally modulating transport channels and electron distribution while stimulating oxygen vacancies to increase active sites.…”

Section: Introductionmentioning

confidence: 99%

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Hu,

Li,

Wang

et al. 2023

View full text Add to dashboard Cite

Na2Ti6O13 (NTO) with high safety has been regarded as a promising anode candidate for sodium‐ion batteries. In the present study, integrated modification of migration channels broadening, charge density re‐distribution, and oxygen vacancies regulation are realized in case of Nb‐doping and have obtained significantly enhanced cycling performance with 92 % reversible capacity retained after 3000 cycles at 3000 mA g−1. Moreover, unexpected low‐temperature performance with a high discharge capacity of 143 mAh g−1 at 100 mA g−1 under −15 °C is also achieved in the full cell. Theoretical investigation suggests that Nb preferentially replaces Ti3 sites, which effectively improves structural stability and lowers the diffusion energy barrier. What's more important, both the in situ X‐ray diffraction (XRD) and in situ Raman furtherly confirm the robust spring effect of the Ti−O bond, making special charge compensation mechanism and respective regulation strategy to conquer the sluggish transport kinetics and low conductivity, which plays a key role in promoting electrochemical performance.

show abstract

“…[11][12][13] In response, many researchers are dedicated to addressing these issues with little success. For example, modulating morphology neglects the intrinsic conductivity, [14,15] surface coating cannot improve reaction kinetics, [16,17] and hybridized structures are inappropriate for industrial scale-up for high costs. [9,18] The heteroelement doping strategy is an effective method for fundamentally modulating transport channels and electron distribution while stimulating oxygen vacancies to increase active sites.…”

Section: Introductionmentioning

confidence: 99%

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Hu,

Li,

Wang

et al. 2023

Angewandte Chemie

0

View full text Add to dashboard Cite

Na2Ti6O13 (NTO) with high safety has been regarded as a promising anode candidate for sodium‐ion batteries. In the present study, integrated modification of migration channels broadening, charge density re‐distribution, and oxygen vacancies regulation are realized in case of Nb‐doping and have obtained significantly enhanced cycling performance with 92 % reversible capacity retained after 3000 cycles at 3000 mA g−1. Moreover, unexpected low‐temperature performance with a high discharge capacity of 143 mAh g−1 at 100 mA g−1 under −15 °C is also achieved in the full cell. Theoretical investigation suggests that Nb preferentially replaces Ti3 sites, which effectively improves structural stability and lowers the diffusion energy barrier. What's more important, both the in situ X‐ray diffraction (XRD) and in situ Raman furtherly confirm the robust spring effect of the Ti−O bond, making special charge compensation mechanism and respective regulation strategy to conquer the sluggish transport kinetics and low conductivity, which plays a key role in promoting electrochemical performance.

show abstract

Research progress on modification and application of two-dimensional anode materials for sodium ion batteries

Liang,

Wei,

Huo

et al. 2024

Journal of Energy Storage

2

0

View full text Add to dashboard Cite

Reduced graphene oxide (rGO) integrated sodium titanate nanocomposite as a high-rate performance anode material for sodium ion batteries

Cited by 4 publications

References 45 publications

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Research progress on modification and application of two-dimensional anode materials for sodium ion batteries

Contact Info

Product

Resources

About

Reduced graphene oxide (rGO) integrated sodium titanate nanocomposite as a high-rate performance anode material for sodium ion batteries

Cited by 4 publications

References 45 publications

Improving Low‐temperature Performance and Stability of Na2Ti6O13 Anodes by the Ti−O Spring Effect through Nb‐doping

Improving Low‐temperature Performance and Stability of Na2Ti6O13 Anodes by the Ti−O Spring Effect through Nb‐doping

Improving Low‐temperature Performance and Stability of Na2Ti6O13 Anodes by the Ti−O Spring Effect through Nb‐doping

Research progress on modification and application of two-dimensional anode materials for sodium ion batteries

Contact Info

Product

Resources

About

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping

Improving Low‐temperature Performance and Stability of Na₂Ti₆O₁₃ Anodes by the Ti−O Spring Effect through Nb‐doping