Journal ArticleDOI
Molecular engineering of covalent organic nanosheets for high-performance sodium-ion batteries
TLDR
In this paper, the bandgap-dependent performance of covalent organic nanosheets (CONs) as sodium-ion battery anode materials was probed by inclusion of electron-deficient benzothiadiazole (BT) units into their network.Abstract:
The bandgap-dependent performance of covalent organic nanosheets (CONs) as sodium-ion battery anode materials was probed by inclusion of electron-deficient benzothiadiazole (BT) units into their network. Conjugation of BT units with electron-rich moieties afforded low-bandgap materials, and a self-assembled CON morphology with a large number of insertion sites for Na+ ions was realized via solvothermal Stille cross-coupling. The bandgap dependence of Na+ storage capacity was probed by the synthesis and characterization of large-bandgap CONs, which were subsequently compared to low-bandgap CONs in terms of electrochemical behavior. Four different CONs were investigated in total to reveal that the Na+ storage capacity can be improved by increasing the charge carrier conductivity via the inclusion of BT units, while the surface area can be controlled by maintaining the material backbone. The electrode with a solvothermally prepared low-bandgap CON demonstrated stable rate capability and cycling performance while exhibiting highly enhanced reversible discharge capacity (∼450 mA h g−1) after 30 cycles at a scan rate of 100 mA g−1. To the best of our knowledge, this discharge capacity is among the best values reported so far for organic electrodes prepared without thermal treatment.read more
Citations
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Journal ArticleDOI
Organic electrode materials for non-aqueous, aqueous, and all-solid-state Na-ion batteries
TL;DR: In this article, a review of recent advances in developing organic electrode materials for non-aqueous, aqueous, and all-solid-state NIBs is presented, along with the challenges, advantages, mechanisms, development, and applications of advanced OEMs in NIB.
Journal ArticleDOI
Two-Dimensional Organic/Inorganic Hybrid Nanosheet Electrodes for Enhanced Electrical Conductivity toward Stable and High-Performance Sodium-Ion Batteries.
TL;DR: In this paper, the authors investigated the effect of electrical conductivity on the energy-storage characteristics of anode materials in sodium-ion batteries, where covalent organic nanosheets (CONs) were hybridized with highly conductive GNs via two different optimized synthesis routes, that is, reflux and solvothermal.
Journal ArticleDOI
Hybridization of Layered Titanium Oxides and Covalent Organic Nanosheets into Hollow Spheres for High-Performance Sodium-Ion Batteries with Boosted Electrical/Ionic Conductivity and Ultralong Cycle Life.
TL;DR: In this article , layered titanium oxides were hybridized with covalent organic nanosheets (CONs), which exhibited excellent electrical conductivity, to enlarge the accessible areas for sodium ions, leading to the highly enhanced ionic conductivity.
Journal ArticleDOI
Thiophene derivatives as electrode materials for high-performance sodium-ion batteries
TL;DR: In this paper, an organic compound with high electron transfer capability was designed and synthesized for SIBs, achieving a high reversible capacity of approximately 288 mA h g−1 after 4000 cycles at a high current density of 2.0 Ag−1.
Journal ArticleDOI
Versatile Pendant Polymer for Selective Charge Carrier Transport via Controlling the Supramolecular Self-Assembly
TL;DR: The supramolecular assembly of P4 was found to be more favourable in electronic devices and devices with P4 demonstrated lower dark current than others, which could potentially be useful for charge carrier transport and sensitive photo detecting devices.
References
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Journal ArticleDOI
Issues and challenges facing rechargeable lithium batteries
TL;DR: A brief historical review of the development of lithium-based rechargeable batteries is presented, ongoing research strategies are highlighted, and the challenges that remain regarding the synthesis, characterization, electrochemical performance and safety of these systems are discussed.
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
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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Toward Flexible Batteries
Hiroyuki Nishide,Kenichi Oyaizu +1 more
TL;DR: This paper presents a meta-analyses of the chiral stationary phase of the H2O/O2 mixture and investigates its role in the response to infectious disease and its applications in medicine and the environment.
Journal ArticleDOI
Key challenges in future Li-battery research
TL;DR: There is room for optimism as long as the authors pursue paradigm shifts while keeping in mind the concept of materials sustainability, and relying on new ways to prepare electrode materials via eco-efficient processes, on the use of organic rather than inorganic materials or new chemistries will be discussed.