Journal ArticleDOI
Defective graphene as a high-capacity anode material for Na- and Ca-ion batteries
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In this paper, the authors investigate the adsorption of Na and Ca on graphene with divacancy and Stone-Wales defects in graphene and find that the capacity of graphene increases with the density of the defects.Abstract:
Because of their abundance, sodium and calcium can be attractive in ion batteries for large-scale grid storage. However, many of the anode materials being pursued have limitations including volume expansion, lack of passivating films, and slow kinetics. Here, we investigate the adsorption of Na and Ca on graphene with divacancy and Stone–Wales defects in graphene. Our results show that although adsorption of Na and Ca is not possible on pristine graphene, enhanced adsorption is observed on defective graphene because of increased charge transfer between the adatoms and defects. We find that the capacity of graphene increases with the density of the defects. For the maximum possible divacancy defect densities, capacities of 1450 and 2900 mAh/g for Na- and Ca-ion batteries, respectively, can be achieved. For Stone–Wales defects, we find maximum capacities of 1071 and 2142 mAh/g for Na and Ca, respectively. Our results provide guidelines to create better high-capacity anode materials for Na- and Ca-ion batteries.read more
Citations
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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.
Journal ArticleDOI
Water desalination using nanoporous single-layer graphene
Sumedh P. Surwade,Sergei N. Smirnov,Ivan Vlassiouk,Raymond R. Unocic,Gabriel M. Veith,Sheng Dai,Shannon M. Mahurin +6 more
TL;DR: It is shown that single-layer porous graphene can be used as a desalination membrane using an oxygen plasma etching process and exhibits a salt rejection rate of nearly 100% and rapid water transport.
Journal ArticleDOI
Prediction and Characterization of MXene Nanosheet Anodes for Non-Lithium-Ion Batteries
Yu Xie,Yohan Dall'Agnese,Yohan Dall'Agnese,Michael Naguib,Yury Gogotsi,Michel W. Barsoum,Houlong L. Zhuang,Paul R. C. Kent +7 more
TL;DR: In this paper, a class of two-dimensional transition-metal carbides, called MXene nanosheets, are predicted to serve as highperforming anodes for non-lithium-ion batteries by combined first-principles simulations and experimental measurements.
Journal ArticleDOI
High-density sodium and lithium ion battery anodes from banana peels
Elmira Memarzadeh Lotfabad,Jia Ding,Jia Ding,Kai Cui,Alireza Kohandehghan,Alireza Kohandehghan,W. Peter Kalisvaart,W. Peter Kalisvaart,Mike Hazelton,Mike Hazelton,David Mitlin,David Mitlin +11 more
TL;DR: A combination of XRD and XPS demonstrates highly reversible Na intercalation rather than metal underpotential deposition, and the same analysis proves the presence of metallic Li in the pores, withintercalation being much less pronounced.
Journal ArticleDOI
Peanut shell hybrid sodium ion capacitor with extreme energy–power rivals lithium ion capacitors
Jia Ding,Jia Ding,Huanlei Wang,Huanlei Wang,Zhi Li,Zhi Li,Kai Cui,Dimitre Karpuzov,Xuehai Tan,Xuehai Tan,Alireza Kohandehghan,Alireza Kohandehghan,David Mitlin,David Mitlin,David Mitlin +14 more
TL;DR: In this paper, a hybrid sodium ion capacitor with the active materials in both the anode and the cathode being derived entirely from a single precursor: peanut shells, which are a green and highly economical waste globally generated at over 6 million tons per year.
References
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Issues and challenges facing rechargeable lithium batteries
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