Influence of template agent on NiMoO 4 for high-performance hybrid energy storage devices
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ORIGINAL PAPER
Influence of template agent on NiMoO4 for high-performance hybrid energy storage devices Xu Yang 1 & Enshan Han 1 & Yanzhen He 1 & Jiabao Liu 1 & Yahong Tian 1 & Chenyu Du 1 & Shunpan Qiao 1 & Li Gao 1 Received: 18 July 2020 / Revised: 24 September 2020 / Accepted: 5 November 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Here, NiMoO4 was successfully synthesized via a mild hydrothermal method combined with annealing treatment. The effects of nickel sources and Tween 80 on the morphology and electrochemical performance of NiMoO4 electrode for hybrid energy storage device were investigated in detail. When nickel sulfate as a nickel source, NiMoO4 exhibited a one-dimensional needle structure and reached the best specific capacity of 498 C g−1 at 1 A g−1. Moreover, the different dosages of Tween 80 all improved the morphology and capacity of one-dimensional needle NiMoO4. When the dosage was 0.005 mol, NiMoO4 nanorods formed a flower-like morphology and a higher specific capacity of 754 C g−1. Furthermore, we used the optimized NiMoO4 assembled a hybrid device which reached 68.36 Wh kg−1 at a power density of 923 W kg−1. Keywords NiMoO4 . Tween 80 . Flower-like morphology . Hybrid energy storage device
Introduction Fuel cells, lithium-ion batteries (LIBs), and supercapacitors (SCs) have received widespread attention as a result of the rapid depletion of non-renewable resources and the rapidly growing hybrid car market [1–3]. Compared with LIBs and traditional capacitor, SCs have fast charging-discharging performance, long cycle life, high-power sources, and environmental friendliness, which determine its prospect as a promising energy storage material [4–6]. NiMoO4 is considered one of the most promising electrode materials due to the high electrochemical activity of nickel ions and excellent conductivity of molybdenum ions comparing with other metal oxides. However, inferior rate performance and cycling stability restrict its application [7]. Zhang [8] reported NiMoO4-modified α-MoO3 nanobelts with a capacity of 411 C g−1 at 1 A g−1, while the retention rate is only 50% at 10 A g−1. The α-NiMoO4 fabricated by Senthilkumar reached a high specific capacity of 759 C g−1 and an energy
* Yanzhen He [email protected] Xu Yang [email protected] 1
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People’s Republic of China
density 52.7 Wh kg−1 at a current density of 1.2 A g−1 but the capacitance retention is about 62% at 12 A g −1 [9]. Furthermore, the large volume change during the chargedischarge cycling leads to the collapse of NiMoO4 structures and inferior cycling performance [10]. The structure design is of great importance for electrode materials, and morphology optimization has been adopted to address the issue of rate performance and cycling stability for high-performance hybrid energy storage device. Regulating different raw material sources could be a valid method to construct various architectures in order to obtain differe
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