Journal ArticleDOI
Controllable Design of MoS2 Nanosheets Anchored on Nitrogen-Doped Graphene: Toward Fast Sodium Storage by Tunable Pseudocapacitance
Xin Xu,Xin Xu,Ruisheng Zhao,Wei Ai,Wei Ai,Bo Chen,Hongfang Du,Lishu Wu,Hua Zhang,Wei Huang,Wei Huang,Ting Yu +11 more
TLDR
A simple solvothermal method to synthesize a series of MoS2 nanosheets@nitrogen-doped graphene composites is developed, demonstrating the significance in surface-controlled pseudocapacitance contribution at the high rate and offering some meaningful preparation and investigation experiences for designing electrode materials for commercial sodium-ion batteries with favorable performance.Abstract:
Transition-metal disulfide with its layered structure is regarded as a kind of promising host material for sodium insertion, and intensely investigated for sodium-ion batteries. In this work, a simple solvothermal method to synthesize a series of MoS2 nanosheets@nitrogen-doped graphene composites is developed. This newly designed recipe of raw materials and solvents leads the success of tuning size, number of layers, and interplanar spacing of the as-prepared MoS2 nanosheets. Under cut-off voltage and based on an intercalation mechanism, the ultrasmall MoS2 nanosheets@nitrogen-doped graphene composite exhibits more preferable cycling and rate performance compared to few-/dozens-layered MoS2 nanosheets@nitrogen-doped graphene, as well as many other reported insertion-type anode materials. Last, detailed kinetics analysis and density functional theory calculation are also employed to explain the Na+ - storage behavior, thus proving the significance in surface-controlled pseudocapacitance contribution at the high rate. Furthermore, this work offers some meaningful preparation and investigation experiences for designing electrode materials for commercial sodium-ion batteries with favorable performance.read more
Citations
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Journal ArticleDOI
Achieving high energy density and high power density with pseudocapacitive materials
Christopher S. Choi,David S. Ashby,David S. Ashby,Danielle M. Butts,Ryan H. DeBlock,Qiulong Wei,Jonathan Lau,Jonathan Lau,Bruce Dunn +8 more
TL;DR: In this article, the fundamental electrochemical properties of pseudocapacitive materials, with emphasis on kinetic processes and distinctions between battery and pseudo-capacitive material, are described.
MoS2 Nanosheets Vertically Aligned on Carbon Paper: A Freestanding Electrode for Highly Reversible Sodium Ion Batteries
TL;DR: In this article, a rational design of freestanding anode materials is reported for sodium-ion batteries, consisting of molybdenum disulfide (MoS2) nanosheets aligned vertically on carbon paper derived from paper towel.
Journal ArticleDOI
Freestanding film made by necklace-like N-doped hollow carbon with hierarchical pores for high-performance potassium-ion storage
Wenxiu Yang,Jinhui Zhou,Shuo Wang,Weiyu Zhang,Zichen Wang,Fan Lv,Kai Wang,Qiang Sun,Shaojun Guo +8 more
TL;DR: In this article, an ultra-high pyrrolic/pyridinic-N-doped necklace-like hollow carbon (NHC) material was proposed as a free-standing anode for PIBs.
Journal ArticleDOI
Design Strategies for Development of TMD-Based Heterostructures in Electrochemical Energy Systems
TL;DR: In this paper, transition metal dichalcogenides (TMDs) are evaluated for performance in electrocatalytic conversion (hydrogen evolution reaction) and electrochemical energy storage systems (NiB/LiB/supercapacitors).
Journal ArticleDOI
Conductive carbon nanofiber interpenetrated graphene architecture for ultra-stable sodium ion battery.
TL;DR: The authors construct carbon nanofiber interpenetrated graphene architecture with in-situ grown MoS2 nanoflakes alongside the framework, enabling outstanding electrochemical performance in sodium-ion battery.
References
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Building better batteries
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Where Do Batteries End and Supercapacitors Begin
TL;DR: Electrochemical measurements can distinguish between different types of energy storage materials and their underlying mechanisms, used to recover power in cars and electric mass transit vehicles that would otherwise lose braking energy as heat.
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Research Development on Sodium-Ion Batteries
Naoaki Yabuuchi,Kei Kubota,Kei Kubota,Mouad Dahbi,Mouad Dahbi,Shinichi Komaba,Shinichi Komaba +6 more
Journal ArticleDOI
Oxygen vacancies enhance pseudocapacitive charge storage properties of MoO3-x.
Hyung-Seok Kim,John B. Cook,John B. Cook,Hao Lin,Jesse S. Ko,Sarah H. Tolbert,Sarah H. Tolbert,Vidvuds Ozolins,Bruce Dunn,Bruce Dunn +9 more
TL;DR: This study underscores the potential importance of incorporating oxygen vacancies into transition metal oxides as a strategy for increasing the charge storage kinetics of redox-active materials.
Journal ArticleDOI
A phosphorene–graphene hybrid material as a high-capacity anode for sodium-ion batteries
Jie Sun,Hyun-Wook Lee,Mauro Pasta,Hongtao Yuan,Guangyuan Zheng,Yongming Sun,Yuzhang Li,Yi Cui,Yi Cui +8 more
TL;DR: It is shown that a hybrid material made out of a few phosphorene layers sandwiched between graphene layers shows a specific capacity of 2,440 mA h g(-1) at a current density and an 83% capacity retention after 100 cycles while operating between 0 and 1.5 V.