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A High‐Rate and Stable Quasi‐Solid‐State Zinc‐Ion Battery with Novel 2D Layered Zinc Orthovanadate Array
Author(s) -
Chao Dongliang,
Zhu Changrong Rose,
Song Ming,
Liang Pei,
Zhang Xiao,
Tiep Nguyen Huy,
Zhao Haofei,
Wang John,
Wang Rongming,
Zhang Hua,
Fan Hong Jin
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201803181
Subject(s) - materials science , anode , cathode , electrolyte , battery (electricity) , pseudocapacitance , current density , chemical engineering , intercalation (chemistry) , zinc , dendrite (mathematics) , power density , electrode , supercapacitor , inorganic chemistry , electrochemistry , metallurgy , power (physics) , chemistry , thermodynamics , physics , geometry , mathematics , quantum mechanics , engineering
Zinc‐ion batteries are under current research focus because of their uniqueness in low cost and high safety. However, it is still desirable to improve the rate performance by improving the Zn 2+ (de)intercalation kinetics and long‐cycle stability by eliminating the dendrite formation problem. Herein, the first paradigm of a high‐rate and ultrastable flexible quasi‐solid‐state zinc‐ion battery is constructed from a novel 2D ultrathin layered zinc orthovanadate array cathode, a Zn array anode supported by a conductive porous graphene foam, and a gel electrolyte. The nanoarray structure for both electrodes assures the high rate capability and alleviates the dendrite growth. The flexible Zn‐ion battery has a depth of discharge of ≈100% for the cathode and 66% for the anode, and delivers an impressive high‐rate of 50 C (discharge in 60 s), long‐term durability of 2000 cycles at 20 C, and unprecedented energy density ≈115 Wh kg −1 , together with a peak power density ≈5.1 kW kg −1 (calculation includes masses of cathode, anode, and current collectors). First principles calculations and quantitative kinetics analysis show that the high‐rate and stable properties are correlated with the 2D fast ion‐migration pathways and the introduced intercalation pseudocapacitance.