Chemical Journal of Chinese Universities

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Sodium Storage Performance of Mixed-phase Sodium Titanate Tuned by Carbon Dots

LI Dan, HU Honghui, HOU Hongshuai, ZHANG Sheng, LIU Lijie, JING Mingjun, WU Tianjing

Chem J Chin Univ, 2025, 46(06): 95-106. DOI: 10.7503/cjcu20240356

Fig.2 XRD patterns of NNTO and NNTO/C composites(A), Rietveld refinement(B), Raman analysis(C) and TGA profiles(D) of NNTO/C sample

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Scheme 1 Schematic diagram of NNTO/C preparation process
Fig.1 SEM images of NNTO(A) and NNTO/C(B), TEM(C) and HRTEM images(D) of NNTO/C
Fig.3 N₂ adsorption⁃desorption isotherms and pore size distributions(insets) of NNTO/C(A) and NNTO(B)
Fig.4 XPS survey(A) and high resolution spectra for Ti₂ _p (B), O₁ _s (C) and C₁ _s (D) of NNTO/C
Fig.5 CV plots of NNTO/C at 0.1 mV/s(A), cycling performances of NNTO/C and NNTO at 0.05 A/g(B), rate capabilities of NNTO/C and NNTO(C), charge⁃discharge curves of NNTO/C(D), cycling properties of NNTO/C at 1.00 A/g(E)
Fig.6 CV plots at various sweep speeds(A), capacitive and diffusive contributions at 0.2 mV/s(B), diffusion and pseudo⁃capacitive contributions at various scan rates of NNTO/C(C)
Fig.7 Nyquist plots(A), GITT profiles(B) and Na⁺ diffusion coefficient(C) of NNTO/C and NNTO