A polymerized C60 coating enhancing interfacial stability at three-dimensional LiCoO2 in high-potential regime

Hudaya, Chairul; Halim, Martin; Pröll, J.; Besser, Heino; Choi, Wonchang; Pfleging, Wilhelm; Seifert, Hans Jürgen; Lee, Joong Kee

doi:10.1016/j.jpowsour.2015.08.044

Cited by 23 publications

(15 citation statements)

References 34 publications

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“…The comparative study on the rate-performance between the resulting materials and the HT-LiCoO 2 synthesized through novel liquid phase routes [25,26] or treated by surface modification [27][28][29][30] in recent years is conducted. The resulting material shows a competitive property at the initial charge and discharge capacities.…”

Section: Resultsmentioning

confidence: 99%

Solid state synthesis of ultrafine-LiCoO2 by enhanced thermal decomposition of carbonate precursors followed by double-calcining

et al. 2016

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Section: Resultsmentioning

confidence: 99%

Solid state synthesis of ultrafine-LiCoO2 by enhanced thermal decomposition of carbonate precursors followed by double-calcining

et al. 2016

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“…In order to address this issue, surface coating has been extensively studied using a number of different materials. Carbon coatings, which are commonly used in LIB electrode materials [10][11][12], have been studied to tune electronic/ionic properties of LiCoO 2 [13][14][15]. Besides, the usage of metal oxides such as ZnO [16], MgO [17] and Al 2 O 3 [18] as coating materials are found even more promising due to the synergetic effects of physical protection (partial electrolyte isolation) and chemical interactions (e.g.…”

Section: Introduction：mentioning

confidence: 99%

Sputtering TiO2 on LiCoO2 composite electrodes as a simple and effective coating to enhance high-voltage cathode performance

Zhou

Wang

et al. 2017

Journal of Power Sources

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Surface coating is a key strategy in lithium-ion battery technologies to achieve a high and stable battery performance. Increasing the operation voltage is a direct way to increase the energy density of the battery. In this work, TiO 2 is directly sputtered on as-fabricated LiCoO 2 composite electrodes, enabling a controllable oxide coating on the topmost of the electrode. With an optimum coating, the discharge capacity is able to reach 160 mAh g-1 (86.5 % retention) after 100 cycles within 3.0-4.5 V at 1 C, which is increased by 40 % compared to that of the bare electrode. The high-voltage rate capability of LiCoO 2 is also remarkably enhanced after TiO 2-coating as reflected by the much larger capacity at 10 C (109 vs. 74 mAh g-1). The artificially introduced oxide coating is believed to make the LiCoO 2 electrode more resistant to interfacial side reactions at high voltage and thus minimizes the irreversible loss of the active material upon long cycling. The TiO 2 coating layer is also possible to partially react with the decomposition product of electrolyte (e.g. HF) and form a more stable and conductive interphase containing TiF x , which is responsible for the improvement of the rate capability.

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“…The charge/discharge capacity of 350, 150, and 120 mAh g −1 were obtained for poly-C 60 O, fullerene-poly(N-vinylcarbazole), and fullerene-polystyrene polymer, respectively. For the discharge capacity of 350 mAh g −1 Recently, fullerene homopolymers have been synthesized under plasma conditions as a coating on different matrices used in lithium ion microbatteries, such as fluorine-doped tin oxide (SnO 2 :F), [254] LiCoO 2 , [255] silicon. [246] Figure 45a shows a schematic illustrating the preparation of the 3D high temperature LiCoO 2 electrode coated with polymerized C 60 thin films (C 60 @3D HT-LCO).…”

Section: Alkali-metal Ions Batteriesmentioning

confidence: 99%

Fullerene‐Based Conducting Polymers:n‐Dopable Materials for Charge Storage Application

Grądzka

Wysocka‐Żołopa

Winkler

2020

Advanced Energy Materials

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structure, which can be easily covalently modified. Progress in extensive organic chemistry of fullerene development facilitates the production of a variety of fullerene derivatives with different structures and physicochemical properties. Additionally, the polyhedral structure of fullerenes containing a large number of bonding sites provides an opportunity for a wide range of covalent modifications. Polymeric structures containing fullerene moieties represent a particularly large class of materials in terms of their number, composition, structure, morphology, and physicochemical properties. [24-29] Some of the most common structures of these polymeric materials are schematically shown in Figure 1. The simplest and most common structures are composites formed from the polymeric chains and fullerenes. Fullerenes form a crystalline phase in the polymeric matrix [30] or are incorporated as guest molecules into polymeric chain containing host moieties. [31] In both cases, covalent interactions are not formed between fullerenes and the polymeric network. However, van der Waals and electrostatic interactions, as well as possible charge transfer between both components of the composite significantly modulate the electronic structure of the polymer/fullerene interphase. [32,33] A stronger electronic interaction between the polymer component and fullerene moieties is expected for the system in which carbon cages are covalently bound to the polymeric chain or covalently incorporated into the polymeric backbone. In the case of in-chain structures, fullerene moieties are separated by short organic conjugated linkers, [34-37] small inorganic linkers, [37-39] or metal atoms and metal complexes. [7,8,29,40-42] A large group of fullerene-based materials consists of organic conducting polymers containing fullerenes attached covalently to the polymer chain by the linker. [43-46] The physicochemical properties of these materials depend on the polymer chain, linker structures, and the density of fullerene moieties within the polymeric material. Similar to olefins, fullerene form homopolymers through [2+2] cycloaddition. [47-51] Fullerene homopolymers, in-chain and side chain fullerene polymers can be cross-linked to form 3D polymeric structures. A large number of reactive π-bond centers in the fullerene moiety enable the formation of star-shaped macromolecular systems with polymeric chains covalently grafted to the C 60. [52-57] In common structures, the number of linked This article provides a comprehensive review of research related to the formation and electrochemical properties of fullerene-based conducting polymeric materials. The paper begins with an overview of composites containing fullerenes incorporated into the network of a conducting polymer through van der Walls, electrostatic, or guest-host interactions. The properties of these composites are generally a superposition of the properties of the individual components. More attention is devoted to the structures in which fullerene is covalently incorporated into the polyme...

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A polymerized C60 coating enhancing interfacial stability at three-dimensional LiCoO2 in high-potential regime

Cited by 23 publications

References 34 publications

Solid state synthesis of ultrafine-LiCoO2 by enhanced thermal decomposition of carbonate precursors followed by double-calcining

Solid state synthesis of ultrafine-LiCoO2 by enhanced thermal decomposition of carbonate precursors followed by double-calcining

Sputtering TiO2 on LiCoO2 composite electrodes as a simple and effective coating to enhance high-voltage cathode performance

Fullerene‐Based Conducting Polymers:n‐Dopable Materials for Charge Storage Application

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