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Supporting Information
Facile preparation of cellulose nanofiber derived carbon and
reduced graphene oxide co-supported LiFePO4 nanocomposite as
enhanced cathode material for lithium-ion battery
Seungman Park a,1, Jiseop Oh a,1, Jong Min Kim a, Valentina Guccini c, Taejin Hwang a,
Youngmoo Jeon a, German Salazar-Alvarez d,*, and Yuanzhe Piao a, b, *
a Graduate School of Convergence Science and Technology, Seoul National University, 145
Gwanggyo-ro, Yeongtong-gu, Suwon-Si, Gyeonggi-do, 16229, Republic of Korea
E-mail: [email protected] (Y. Piao)b Advanced Institutes of Convergence Technology, 145 Gwanggyo-ro, Yeongtong-gu,
Suwon-si, Gyeonggi-do, 16229, Republic of Koreac Department of Bioproducts and Biosystems, Aalto University, Otakaari 5A, 02150, Helsinki,
Finlandd Department of Engineering Sciences, Solid State Physics, Uppsala University, Uppsala, 751
21, Sweden
E-mail: [email protected] (G. Salazar-Alvarez)
1 These authors contributed equally to this work.
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Figure S1. EDS mapping images of the LFP/G.
Figure S2. Low magnification SEM image of the LFP/cCNF.
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Figure S3. SEM image of LFP nanoparticles.
Figure S4. Nitrogen adsorption/desorption isotherms of the LFP/G/cCNF, LFP/cCNF and LFP/G.
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Figure S5. HRTEM images of the LFP/G/cCNF.
Figure S6. EDS mapping images of the LFP/G.
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Figure S7. EDS mapping images of the LFP/cCNF.
Figure S8. Galvanostatic cycling profiles at 0.1C (a) and 10C (b) of the LFP/G in the
potential window of 2.0–4.2 V.
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Figure S9. Rate capabilities of Bare LFP.
Figure S10. Rate capabilities of LFP/G/cCNF, LFP/cCNF, and LFP/G. The carbon contents
are the same as LFP/G/cCNF.
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Figure S11. SEM images of the (a) LFP/G (b) LFP/cCNF, and (c) LFP/G/cCNF electrodes
after 100 cycles at 10C, respectively.
Figure S12. Differential capacity (dQ/dV) as a function of potential (V) at 0.1C
corresponding to LFP/G/cCNF, LFP/cCNF, and LFP/G.
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Figure S13. CV profiles of LFP/cCNF (a) and LFP/G (b) at different scan rates from 0.2 to
3.0 mV s-1. The insets are the peak currents for sweep rates ranging from 0.2 to 2 mV s -1
combined with the fitting curves.
Sample Carbon content (wt %)LFP/G 2.03
LFP/cCNF 2.97LFP/G/cCNF 4.78
Table S1. Elemental analysis of LFP/G, LFP/cCNF, and LFP/G/cCNF
Sample RΩ / Ω∙cm-2 RSEI / Ω∙cm-2 Rct / Ω∙cm-2
LFP/G/cCNF 3.27 ± 0.09 33.7 ± 2.12 29.6 ± 1.25LFP/cCNF 3.26 ± 0.33 34.4 ± 3.32 96.1 ± 7.44
LFP/G 3.36 ± 0.34 35.4 ± 1.68 136.0 ± 3.87
Table S2. The fitting values of the resistance components in the simplified equivalent circuit.
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