Na + intercalation pseudocapacitance in graphene-coupled titanium oxide enabling ultra-fast sodium storage and long-term cycling
Chaoji Chen,Yanwei Wen,Xianluo Hu,Xiulei Ji,Mengyu Yan,Liqiang Mai,Pei Hu,Bin Shan,Yunhui Huang +8 more
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TLDR
It is demonstrated that the Na(+) intercalation pseudocapacitance in TiO2/graphene nanocomposites enables high-rate capability and long cycle life in a sodium-ion battery.Abstract:
Sodium-ion batteries are emerging as a highly promising technology for large-scale energy storage applications. However, it remains a significant challenge to develop an anode with superior long-term cycling stability and high-rate capability. Here we demonstrate that the Na(+) intercalation pseudocapacitance in TiO2/graphene nanocomposites enables high-rate capability and long cycle life in a sodium-ion battery. This hybrid electrode exhibits a specific capacity of above 90 mA h g(-1) at 12,000 mA g(-1) (∼36 C). The capacity is highly reversible for more than 4,000 cycles, the longest demonstrated cyclability to date. First-principle calculations demonstrate that the intimate integration of graphene with TiO2 reduces the diffusion energy barrier, thus enhancing the Na(+) intercalation pseudocapacitive process. The Na-ion intercalation pseudocapacitance enabled by tailor-deigned nanostructures represents a promising strategy for developing electrode materials with high power density and long cycle life.read more
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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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Latest advances in supercapacitors: from new electrode materials to novel device designs.
Faxing Wang,Faxing Wang,Faxing Wang,Xiongwei Wu,Xiongwei Wu,Xinhai Yuan,Zaichun Liu,Yi Zhang,Lijun Fu,Yusong Zhu,Qingming Zhou,Yuping Wu,Yuping Wu,Wei Huang +13 more
TL;DR: The state-of-the-art progress toward mechanisms, new materials, and novel device designs for supercapacitors is summarized and key technical challenges are highlighted regarding further research in this thriving field.
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Array of nanosheets render ultrafast and high-capacity Na-ion storage by tunable pseudocapacitance
Dongliang Chao,Changrong Zhu,Peihua Yang,Xinhui Xia,Jilei Liu,Jin Wang,Xiaofeng Fan,Serguei V. Savilov,Jianyi Lin,Hong Jin Fan,Zexiang Shen +10 more
TL;DR: A high-capacity and high-rate sodium-ion anode based on ultrathin layered tin(II) sulfide nanostructures, in which a maximized extrinsic pseudocapacitance contribution is identified and verified by kinetics analysis.
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Advanced Energy Storage Devices: Basic Principles, Analytical Methods, and Rational Materials Design.
TL;DR: Basic techniques and analysis methods to distinguish the capacitive and battery‐like behavior are discussed and guidelines for material selection, the state‐of‐the‐art materials, and the electrode design rules to advanced electrode are proposed.
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Na-Ion Battery Anodes: Materials and Electrochemistry
TL;DR: Rapid progress has been made in NIB cathode materials, where layered metal oxides and polyanionic compounds exhibit encouraging results, and electrochemical intercalation of Na ions into reduced graphene oxide is applied for fabricating transparent conductors, demonstrating the great feasibility of Na ion interCalation for optical applications.
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A climbing image nudged elastic band method for finding saddle points and minimum energy paths
TL;DR: In this article, a modification of the nudged elastic band method for finding minimum energy paths is presented, where one of the images is made to climb up along the elastic band to converge rigorously on the highest saddle point.
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Electrical Energy Storage for the Grid: A Battery of Choices
TL;DR: The battery systems reviewed here include sodium-sulfur batteries that are commercially available for grid applications, redox-flow batteries that offer low cost, and lithium-ion batteries whose development for commercial electronics and electric vehicles is being applied to grid storage.