Journal ArticleDOI
Unveiling the Electrochemical Mechanism of High-Capacity Negative Electrode Model-System BiFeO3 in Sodium-Ion Batteries: An In Operando XAS Investigation.
Ammu Surendran,Harsha Enale,Aswathi Thottungal,Angelina Sarapulova,Michael Knapp,S.T. Nishanthi,Ditty Dixon,Aiswarya Bhaskar +7 more
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In this paper , a negative electrode (anode) material for Na-ion batteries was synthesized via a sol-gel method and investigated as a conversion-type anode model-system for sodium-ion half-cells.Abstract:
Careful development and optimization of negative electrode (anode) materials for Na-ion batteries (SIBs) are essential, for their widespread applications requiring a long-term cycling stability. BiFeO3 (BFO) with a LiNbO3-type structure (space group R3c) is an ideal negative electrode model system as it delivers a high specific capacity (770 mAh g-1), which is proposed through a conversion and alloying mechanism. In this work, BFO is synthesized via a sol-gel method and investigated as a conversion-type anode model-system for sodium-ion half-cells. As there is a difference in the first and second cycle profiles in the cyclic voltammogram, the operating mechanism of charge-discharge is elucidated using in operando X-ray absorption spectroscopy. In the first discharge, Bi is found to contribute toward the electrochemical activity through a conversion mechanism (Bi3+ → Bi0), followed by the formation of Na-Bi intermetallic compounds. Evidence for involvement of Fe in the charge storage mechanism through conversion of the oxide (Fe3+) form to metallic Fe and back during discharging/charging is also obtained, which is absent in previous literature reports. Reversible dealloying and subsequent oxidation of Bi and oxidation of Fe are observed in the following charge cycle. In the second discharge cycle, a reduction of Bi and Fe oxides is observed. Changes in the oxidation states of Bi and Fe, and the local coordination changes during electrochemical cycling are discussed in detail. Furthermore, the optimization of cycling stability of BFO is carried out by varying binders and electrolyte compositions. Based on that, electrodes prepared with the Na-carboxymethyl cellulose (CMC) binder are chosen for optimization of the electrolyte composition. BFO-CMC electrodes exhibit the best electrochemical performance in electrolytes containing fluoroethylene carbonate (FEC) as the additive. BFO-CMC electrodes deliver initial capacity values of 635 and 453 mAh g-1 in the Na-insertion (discharge) and deinsertion (charge) processes, respectively, in the electrolyte composition of 1 M NaPF6 in EC/DEC (1:1, v/v) with a 2% FEC additive. The capacity values stabilize around 10th cycle and capacity retention of 73% is observed after 60 cycles with respect to the 10th cycle charge capacity.read more
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Modeling of Al12N12, Mg12O12, Ca12O12, and C23N nanostructured as potential anode materials for sodium-ion battery
Hitler Louis,Bartholomew B. Isang,Tomsmith O. Unimuke,T. Gber,Ismail O. Amodu,A. I. Ikeuba,Adedapo S. Adeyinka +6 more
Journal ArticleDOI
Applications of all-inorganic perovskites for energy storage
Ziyang Jia,Caipeng Cheng,Xin Chen,Lili Liu,Rui. Ding,Jilei Ye,Jing Wang,Lijun Fu,Yuhui Chen,Yuping Wu +9 more
TL;DR: In this paper , a review of perovskite-based electrode materials with controllable properties and structural advantages has been presented in the field of electrochemical energy storage, focusing on the controllability and structural properties.
Journal ArticleDOI
Halides (Cl, F, and Br) encapsulated Ga12As12 nanocages used to improve the cell voltage for enhanced battery performance
TL;DR: In this paper , the effect of neutral and ionic interactions on the electrochemical and geometric properties, the binding energy and quantum descriptors of the M/M+ ions in the Ga12As12 nanocage have been studied.
Journal ArticleDOI
Carboxymethyl cellulose-based materials as an alternative source for sustainable electrochemical devices: a review
TL;DR: In this article , carboxymethyl cellulose (CMC) has become an overarching material in electrochemical devices pertaining to its amphiphilic nature with multi-carbon functional groups.
Journal ArticleDOI
Benefits and Development Challenges for Conversion-Alloying Anode Materials in Na-Ion Batteries
TL;DR: In this article , the authors provide a survey of the recent developments of conversion-alloying-type anode materials for Na-ion batteries discussed in the context of their operation mechanism.
References
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Journal ArticleDOI
Challenges for Rechargeable Li Batteries
John B. Goodenough,Youngsik Kim +1 more
TL;DR: In this paper, the authors reviewed the challenges for further development of Li rechargeable batteries for electric vehicles and proposed a nonflammable electrolyte with either a larger window between its lowest unoccupied molecular orbital and highest occupied molecular orbital (HOMO) or a constituent that can develop rapidly a solid/ electrolyte-interface (SEI) layer to prevent plating of Li on a carbon anode during a fast charge of the battery.
Journal ArticleDOI
The Li-ion rechargeable battery: a perspective.
John B. Goodenough,Kyusung Park +1 more
TL;DR: New strategies are needed for batteries that go beyond powering hand-held devices, such as using electrode hosts with two-electron redox centers; replacing the cathode hosts by materials that undergo displacement reactions; and developing a Li(+) solid electrolyte separator membrane that allows an organic and aqueous liquid electrolyte on the anode and cathode sides, respectively.
Journal ArticleDOI
Sodium‐Ion Batteries
TL;DR: In this paper, the status of ambient temperature sodium ion batteries is reviewed in light of recent developments in anode, electrolyte and cathode materials, including high performance layered transition metal oxides and polyanionic compounds.
Journal ArticleDOI
Physics and Applications of Bismuth Ferrite
Gustau Catalan,James F. Scott +1 more
TL;DR: In this paper, the authors summarize both the basic physics and unresolved aspects of BiFeO3 and device applications, which center on spintronics and memory devices that can be addressed both electrically and magnetically.
Journal ArticleDOI
Sodium-ion batteries: present and future
TL;DR: Current research on materials is summarized and discussed and future directions for SIBs are proposed to provide important insights into scientific and practical issues in the development of S IBs.
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