Effect of extended polymer chains on properties of transparent graphene nanosheets conductive film

Huang, Yuan-Li; Tien, Hsi-Wen; Chen‐Chi, M.; Yang, Shao-Ming; Wu, Sheng-Yen; Liu, Hong-Yuan; Mai, Yiu‐Wing

doi:10.1039/c1jm13790e

Cited by 123 publications

(59 citation statements)

References 44 publications

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“…We also have to take into account that besides these decomposition products Li could reside on the surface as a complexed cation (Li + (EC) n ) . For the present XPS analysis, we consider potential decomposition products containing CO, COC, and CC (CH) bonds, which according to the literature results in C 1s BEs of ≈288, ≈287, and ≈284–285 eV, respectively …”

Section: Resultsmentioning

confidence: 99%

Interaction of Ultrathin Films of Ethylene Carbonate with Oxidized and Reduced Lithium Cobalt Oxide—A Model Study of the Cathode|Electrolyte Interface in Li‐Ion Batteries

Büchner

Fingerle

Kim

et al. 2018

Adv Materials Inter

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Li-ion batteries (LIBs). [1][2][3][4][5][6][7][8][9] One of the most crucial parts for their performance and lifetime is the interfacial layer between electrodes and electrolyte, the so-called solid|electrolyte interphase (SEI) at the electrode|electrolyte interface (EEI), which is formed during initial battery operation. [10][11][12][13][14][15] It is generated by the decomposition of electrolytes, forming a passivating layer, which is beneficial for the longtime stability of the battery. The detailed atomic/molecular-scale understanding of the SEI formation process is hampered by the complexity of the cell processes participating therein, including the transfer of Li + ions across the interphase, electrolyte reduction/oxidation, and chemical reactions, all of which are expected to play a role in the SEI formation. Furthermore, standard electrolytes usually consist of a mix of several components such as ethylene carbonate (EC), propylene carbonate, diethyl carbonate (DEC), or dimethyl carbonate and a lithium salt such as lithium hexafluorophosphate (LiPF 6 ), [16] which increases the complexity and makes it difficult to identify individual reactions. Furthermore, the processes at the EEI in LIBs are hardly accessible by techniques providing molecularscale information.One possible way to determine the initial stages of the SEI formation at the EEI at the atomic/molecular level involves the use of surface science techniques, studying the interaction of individual components of electrolytes, such as the typical key component EC (or other electrolyte components like ionic liquids), with well-defined model electrodes under idealized ultrahigh-vacuum (UHV) conditions, [17][18][19][20][21][22][23][24][25][26][27][28][29] which is focus of the ongoing work in our laboratory. Following a previous study on the interaction of EC with Li-free and lithiated highly oriented pyrolytic graphite (HOPG) as model for the anode, [17] we here report the results of a similar type of study on the interaction of EC with well-defined LiCoO 2 electrode surfaces, both fully oxidized LiCoO 2 and partly reduced LiCoO 2−δ surfaces, as models for the cathode. These two different types of samples were chosen since they are expected to exist also under application conditions, and since the oxidation state is expected to influence also their reactivity. Aiming at a detailed, molecular-scale understanding of the initial stages of the solid|electrolyte interphase (SEI) formation in Li-ion batteries, the interaction of the common electrolyte solvent component ethylene carbonate (EC)with fully lithiated LiCoO 2 and reduced LiCoO 2−δ films as model electrodes for the cathode is investigated. The results are compared with previous findings for pristine and lithiated highly oriented pyrolytic graphite, serving as model anode. Employing X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy measurements, it is found that vapor deposition of EC on LiCoO 2 and LiCoO 2−δ at 80 K results in molecularly adsorbed EC, both in the mon...

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Section: Resultsmentioning

confidence: 99%

Interaction of Ultrathin Films of Ethylene Carbonate with Oxidized and Reduced Lithium Cobalt Oxide—A Model Study of the Cathode|Electrolyte Interface in Li‐Ion Batteries

Büchner

Fingerle

Kim

et al. 2018

Adv Materials Inter

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“…The peak centered at 284.5 eV was attributed to the C-C bond. The other peaks centered at 285.9 eV, 286.5 eV, 287.6 eV, and 288.2 eV were assigned to the C-N, C-O, C=O, and O-C=O bonds, respectively [12,13]. The treatment of collagen scaffolds with EDC increased the relative atomic percentage of C-N by -12 -1.23-fold compared to non-modified collagen scaffolds.…”

Section: Preparation Of Go-collagen Scaffoldsmentioning

confidence: 99%

Covalent conjugation of mechanically stiff graphene oxide flakes to three-dimensional collagen scaffolds for osteogenic differentiation of human mesenchymal stem cells

Kang

Park

Lee

et al. 2015

Carbon

116

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“…Arg-Gly-Asp motif conjugated to nano-rGO enhanced selective cellular uptake and photoablation in U87MG cancer cells. 204,205 Folic acid-conjugated GO-loaded nanocarriers with photosensitizers significantly increased the accumulation of chlorin e6 (Ce6) and photodynamic efficacy in tumor cells. 204,205 Subsequently, Tian et al 206 reported that the photosensitizer molecule, Ce6, can be loaded on PEG-functionalized GO via supramolecular π-π stacking.…”

Section: Biomedical Applications Of Graphenementioning

confidence: 99%

“…204,205 Folic acid-conjugated GO-loaded nanocarriers with photosensitizers significantly increased the accumulation of chlorin e6 (Ce6) and photodynamic efficacy in tumor cells. 204,205 Subsequently, Tian et al 206 reported that the photosensitizer molecule, Ce6, can be loaded on PEG-functionalized GO via supramolecular π-π stacking. The GO-PEG-Ce6 complex obtained shows excellent water solubility, generation of cytotoxic singlet oxygen, and enhanced intracellular trafficking under light excitation for PDT using photosensitizers.…”

Section: Biomedical Applications Of Graphenementioning

confidence: 99%

Synthesis, toxicity, biocompatibility, and biomedical applications of graphene and graphene-related materials

Gurunathan¹,

Kim²

2016

IJN

247

140

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Graphene is a two-dimensional atomic crystal, and since its development it has been applied in many novel ways in both research and industry. Graphene possesses unique properties, and it has been used in many applications including sensors, batteries, fuel cells, supercapacitors, transistors, components of high-strength machinery, and display screens in mobile devices. In the past decade, the biomedical applications of graphene have attracted much interest. Graphene has been reported to have antibacterial, antiplatelet, and anticancer activities. Several salient features of graphene make it a potential candidate for biological and biomedical applications. The synthesis, toxicity, biocompatibility, and biomedical applications of graphene are fundamental issues that require thorough investigation in any kind of applications related to human welfare. Therefore, this review addresses the various methods available for the synthesis of graphene, with special reference to biological synthesis, and highlights the biological applications of graphene with a focus on cancer therapy, drug delivery, bio-imaging, and tissue engineering, together with a brief discussion of the challenges and future perspectives of graphene. We hope to provide a comprehensive review of the latest progress in research on graphene, from synthesis to applications.

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Effect of extended polymer chains on properties of transparent graphene nanosheets conductive film

Cited by 123 publications

References 44 publications

Interaction of Ultrathin Films of Ethylene Carbonate with Oxidized and Reduced Lithium Cobalt Oxide—A Model Study of the Cathode|Electrolyte Interface in Li‐Ion Batteries

Interaction of Ultrathin Films of Ethylene Carbonate with Oxidized and Reduced Lithium Cobalt Oxide—A Model Study of the Cathode|Electrolyte Interface in Li‐Ion Batteries

Covalent conjugation of mechanically stiff graphene oxide flakes to three-dimensional collagen scaffolds for osteogenic differentiation of human mesenchymal stem cells

Synthesis, toxicity, biocompatibility, and biomedical applications of graphene and graphene-related materials

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