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HỘI THẢO QUỐC TẾ ATiGB LẦN THỨ CHÍN - The 9 ATiGB 2024 159

fade, with the discharging capacity decreasing from Zn-based batteries via deeply understanding their mechanism
112.5 mAh/g to 72.08 mAh/g, approximately 35% of and using electrolyte additive”, Adv. Funct. Master, Vol. 29,
the initial cycle. The coulombic efficiency was 99.4 pp. 1903605, 2019.
%. This capacity decline could be due to unwanted [10]. B.E. Conway, V. Birss, J. Wojtowicz, “The role and
side reactions affecting the zinc plate surface, uneven utilization of pseudocapacitance for energy storage by
supercapacitors”, J. Power Sources, voil. 66, pp. 1-14, 1997.
deposition of Zn and Li ions, leading to non-uniform [11].T. Brezesinski, J. Wang, J. Polleux, B. Dunn, S.H. Tolbert, J.
electrode surface contact, which increases the internal Lim, B. Dunn, B. E. Conway, V. Birss, J. Wojtowicz, H.
resistance of the battery and affects the Lindstrom, ¨S. Sodergren, ¨ A. Solbrand, H. Rensmo, J. Hjelm,
electrochemical reactions, resulting in capacity A. Hagfeldt, S.-E. Lindquist, S. Britto, M. Leskes, X. Hua, C.-
degradation. A. H´ ebert, H.S. Shin, S. Clarke, O. Borkiewicz, K.W.
Chapman, R. Seshadri, J. Cho, C.P. Grey, “Pseudocapacitive
4. CONSLUSIONS contributions to electrochemical energy storage in TiO2
(anatase) Nanoparticles”, J. Am. Chem. Soc, Vol. 101, pp.
In summary, a study was conducted on an aqueous 1802-1809, 1997.
hybrid zinc battery system using an LFP cathode in a
pouch cell configuration. Electrochemical
characterization revealed that the LFP material
exhibited a redox pair, with a reduction peak
(corresponding to the discharge process) at 1.12V and
an oxidation peak (corresponding to the charge
process) at 1.35V. The capacity of the Zn/LFP pouch
cell using a 3M LiCl + 4M ZnCl 2 electrolyte after 80
cycles was 72 mAh/g at a current rate of 0.5C. The
battery efficiency after 80 cycles reached 99.4%.
ACKNOWLEDGMENT
VINIF partly supports this work. Bien Nguyen
was funded by the Master, PhD Scholarship
Programme of VinGroup Innovation Foundation
(VINIF), code VINIF. 2023.ThS.015.
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