A binder-free Ge-nanoparticle anode assembled on multiwalled carbon nanotube networks for Li-ion batteries

Hwang, In Sung; Kim, Jae Chan; Seo, Seung Deok; Lee, Sung-Jun; Lee, Jong Heun; Kim, Dong-Wan

doi:10.1039/c2cc32901h

Cited by 92 publications

(65 citation statements)

References 22 publications

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“…Binder-free CNT anodes can address this issue and can be realized through electrophoretic deposition (EPD) or layer by layer (LBL) deposition techniques. There are many reports of high lithium storage capacity using EPD techniques [37][38][39] and the LBL route can achieve accurate control of thickness and morphology by virtue of the interaction of cations and anions with functional groups attached on the outer walls of CNTs (as shown in Fig. 3).…”

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confidence: 99%

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

et al. 2017

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As the most commonly used potential energy conversion and storage devices, lithium-ion batteries (LIBs) have been extensively investigated for a wide range of fields including information technology, electric and hybrid vehicles, aerospace, etc. Endowed with attractive properties such as high energy density, long cycle life, small size, low weight, few memory effects and low pollution, LIBs have been recognized as the most likely approach to be used to store electrical power in the future. This review will start with a brief introduction to charge-discharge principles and performance assessment indices. The advantages and disadvantages of several commonly studied anode materials including carbon, alloys, transition metal oxides and silicon along with lithium intercalation will be reviewed. The mechanism and synthesis methods, followed by strategies to enhance battery performance by virtue of interesting structural designs will be examined. Finally, a few issues needing further exploration will be discussed followed by a brief outline of the prospects and outlook for the LIB field.

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confidence: 99%

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

et al. 2017

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“…After 400 cycles at 40C rate, the capacity was 1000 mAh g À1 . Surprisingly, most studies on Ge anodes have been performed on nano-Ge with dimensions 100 nm [267,[269][270][271] or even 3 nm [272] missing the main interest of the germanium element, presumably by continuity with the prior works on Si where the nano-size was mandatory. In particular, Ge nanowires have been grown by CVD [273], like Si nanowires.…”

Section: Germaniummentioning

confidence: 96%

Anodes for Li-Ion Batteries

et al. 2016

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Lithium-ion batteries (LiBs) have made considerable progress since the first commercial one by Sony in 1991, which had LiCoO 2 and graphite as active elements of the positive and negative electrodes, respectively. The LiBs are now the primary energy storage devices in the transportation and communications, from portable use in computers, up to electric and hybrid vehicles. More recently, they have also been used as back-up supply units, frequency regulators (load leveling) to integrate on smart grids the electricity produced by windmills and photovoltaic plants (for a recent review, see [1]). These applications require high energy densities, high power, and safety among others. Considerable efforts have been made to propose other electrodes to fulfill these requirements. We have recently reviewed the works and progress concerning the materials for the positive electrode [2][3][4][5][6]. The present work is devoted to the materials for the negative electrode counterpart. It is common to use the terminology anode and cathode for the negative and positive electrodes, respectively, although the electrodes play alternatively the role of anode and cathode during the charge and discharge process. We shall use this terminology in the following for conciseness purposes only.An ideal active anode element should fulfill the following requirements as follows: (1) It must be light and accommodate as much Li as possible to optimize the gravimetric capacity. (2) Its redox potential with respect to Li 0 /Li + must be as small as possible at any Li-concentration. The reason is that this potential is subtracted to the redox potential of the cathode material to give the overall voltage of the cell, and smaller voltage means smaller energy density. (3) It must possess good electronic and ionic conductivities since faster motion of the lithium ions and the electrons also mean higher power density of the cell. (4) It must not be soluble in the solvents of the electrolyte and not react with the lithium salt. (5) It must be safe, i.e. avoid any thermal runaway of the battery, a criterion that is not independent of the previous one, but deserves special attention, especially for use in transportation such as electric vehicles and planes. (6) It must be cheap and environmentally friendly. The different materials proposed as anode elements for Li-ion batteries must be discussed with respect to these different criteria.The graphite is still the most used anode material and is still the reference. The first works giving evidence of the insertion of lithium in graphite date from 1955 [7], confirmed by the synthesis of LiC 6 in 1965 [8]. The synthesis of LiC 6 , however, was not obtained by electrochemical process at that time. Another decade was spent before Besenhard and Eichinger discovered the reversible intercalation of lithium in graphite, proposing this material as an anode in 1976 [9,10]. Increasing the Li content in LiC 6 is possible [8], but no reversible cycling beyond LiC 6 could ever be obtained. The graphite anode can thus be cyc...

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“…In addition, the accommodation of rGO is a well-known reason for the enhanced electrochemical performances of Ge-based materials [18,19,23,24]. In the literatures, pyrolytic carbon from polymer could gather carbon-encapsulated materials [58,59] …”

Section: Accepted Manuscriptmentioning

confidence: 99%

Enhanced Li-storage performances of dually-protected CoGeO3 nanocomposites as anode materials for lithium ion batteries

et al. 2016

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A binder-free Ge-nanoparticle anode assembled on multiwalled carbon nanotube networks for Li-ion batteries

Cited by 92 publications

References 22 publications

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

Nanostructured anode materials for lithium-ion batteries: principle, recent progress and future perspectives

Anodes for Li-Ion Batteries

Enhanced Li-storage performances of dually-protected CoGeO3 nanocomposites as anode materials for lithium ion batteries

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