Ab initio study of sodium intercalation into disordered carbon

Tsai, Ping Chun; Chung, Sai Cheong; Lin, Shih‐kang; Yamada, Atsuo

doi:10.1039/c5ta01443c

Cited by 211 publications

(246 citation statements)

References 44 publications

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“…This trend would be consistent with a recent ab initio study of sodium intercalation in disordered carbons [66], which predicts Na + ion intercalation beginning at ~0.7 V vs Na/Na + , attributing the higher values found in the literature (1.2-1.5 V vs Na/Na + ) to the strong bonding to oxygen functional groups on the materials surface. Another feature of these profiles is the absence of plateaus below 0.2 V, as no significant slope changes can be appreciated down to 0.003 V vs Na/Na + , as opposed to those typically observed for hard carbons [33,66]. This implies that only a small amount of Na + ions is inserted into nanopores/nanocavities in the EGs materials prepared.…”

Section: Mechanism Of Interaction With Na + Ions: Influence Of Oxygensupporting

confidence: 92%

Expanded graphitic materials prepared from micro- and nanometric precursors as anodes for sodium-ion batteries

Ramos

Cameán

Cuesta

et al. 2016

Electrochimica Acta

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A series of expanded graphitic materials are prepared from two different precursors: micrometric synthetic graphite and graphitized carbon nanofibers, and tested as anodes for sodium-ion batteries. The materials preparation involves the oxidation of the precursors followed by partial thermal reduction. Overall, the expanded synthetic graphite materials show better electrochemical performance as anode than the expanded graphite nanofibers, providing higher specific capacity, leading to lower capacity losses in the first charge-discharge cycle and exhibiting outstanding cycling stability. Specific capacities of ~150 mA h g -1 at 37 mA g -1 and ~110 mA h g -1 at 100 mA g -1 are attained, and up to 50 % of initial capacity at 19 mA g -1 is kept at 372 mA g -1. Unexpectedly, higher capacity losses are measured for the nanostructured electrodes by progressively increasing the current density. These differences are attributed to the lower surface area and porosity of expanded synthetic graphite materials which favors the formation of thinner and more stable SEI, thus reducing the electrode resistance and enhancing Na + ions accessibility to surface oxygen groups with the consequent increase of the surface capacity which was found to be the main contribution to the total specific capacity.

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Section: Mechanism Of Interaction With Na + Ions: Influence Of Oxygensupporting

confidence: 92%

Expanded graphitic materials prepared from micro- and nanometric precursors as anodes for sodium-ion batteries

Ramos

Cameán

Cuesta

et al. 2016

Electrochimica Acta

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“…They showed good electrochemical properties and cycling stability that compared favorably with previously reported disordered carbons [6,[19][20][21][22]. Additionally, we found that the role of the incorporated Febased nanoparticles in the electrochemical performance was due to Fe 3 C species which were passivated during the first few charge-discharge cycles.…”

Section: Introductionsupporting

confidence: 80%

“…Both, structural disorder and larger interlayer distance have been identified as factors that can improve Li ? and Na ? ion storage in carbonaceous electrodes [6,21,22].…”

Section: Processing and Morphologymentioning

confidence: 99%

Processing nanoparticle–nanocarbon composites as binder-free electrodes for lithium-based batteries

Baloch

Kubiak

Roddatis

et al. 2017

Mater Renew Sustain Energy

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The processing of battery materials into functional electrodes traditionally requires the preparation of slurries using binders, organic solvents, and additives, all of which present economic and environmental challenges. These are amplified in the production of nanostructured carbon electrodes which are often more difficult to disperse in slurries and require more energy-intensive and longer processing. In this study we demonstrate a new process for preparing binder-free nanocarbon/nanoparticle (Fe-C) composite electrodes and study the effect of processing on the nanocomposite's cycling performance in lithium cells. The binder-free electrodes were prepared by a two-step method: pulsed-electrodeposition of iron-based catalyst followed by chemical vapor deposition of a carbon film. SEM and TEM of the Fe-C showed that the active materials have a fibrous and tortuous morphology with disordered nanocrystalline domains characteristic of an amorphous carbon. The Fe-C electrodes showed good mechanical stability and an excellent cycle performance with an average stable capacity of 221 mAhg -1 , and 85% capacity retention for up to 50 cycles. By reducing the number of processing steps and eliminating the use of binders and other chemicals this new method offers a ''greener'' alternative than current processing methods. Graphical abstractSynopsis: gains in sustainability can be achieved by eliminating use of binders, chemicals, and the number of electrode's processing steps in this new method.

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“…[ 138,269, The storage of Na in carbon materials such as hard carbon, amorphous carbon, defected graphene, and functionalized graphite has been observed to be thermodynamically feasible. [ 325,326,274,276 ] In the early works by Doeff et al, they demonstrated that the extent of Na intercalation in carbon materials varies depending on the carbon structure; NaC 70 , NaC 30 , and NaC 15 were formed for graphite, petroleum coke, and Shawinigan black, respectively. [ 277 ] The inserted Na ions were also reversibly extracted from the carbon materials.…”

Section: Non-graphitic Carbonmentioning

confidence: 99%

Section: Non-graphitic Carbonmentioning

confidence: 99%

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

Kim

Zhang

et al. 2016

Advanced Energy Materials

871

595

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Grid‐scale energy storage systems (ESSs) that can connect to sustainable energy resources have received great attention in an effort to satisfy ever‐growing energy demands. Although recent advances in Li‐ion battery (LIB) technology have increased the energy density to a level applicable to grid‐scale ESSs, the high cost of Li and transition metals have led to a search for lower‐cost battery system alternatives. Based on the abundance and accessibility of Na and its similar electrochemistry to the well‐established LIB technology, Na‐ion batteries (NIBs) have attracted significant attention as an ideal candidate for grid‐scale ESSs. Since research on NIB chemistry resurged in 2010, various positive and negative electrode materials have been synthesized and evaluated for NIBs. Nonetheless, studies on NIB chemistry are still in their infancy compared with LIB technology, and further improvements are required in terms of energy, power density, and electrochemical stability for commercialization. Most recent progress on electrode materials for NIBs, including the discovery of new electrode materials and their Na storage mechanisms, is briefly reviewed. In addition, efforts to enhance the electrochemical properties of NIB electrode materials as well as the challenges and perspectives involving these materials are discussed.

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Ab initio study of sodium intercalation into disordered carbon

Cited by 211 publications

References 44 publications

Expanded graphitic materials prepared from micro- and nanometric precursors as anodes for sodium-ion batteries

Expanded graphitic materials prepared from micro- and nanometric precursors as anodes for sodium-ion batteries

Processing nanoparticle–nanocarbon composites as binder-free electrodes for lithium-based batteries

Recent Progress in Electrode Materials for Sodium‐Ion Batteries

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