Strong, persistent superficial oxidation-assisted chemical bonding of black phosphorus with multiwall carbon nanotubes for high-capacity ultradurable storage of lithium and sodium

Title
Strong, persistent superficial oxidation-assisted chemical bonding of black phosphorus with multiwall carbon nanotubes for high-capacity ultradurable storage of lithium and sodium
Authors
조병원정경윤Safa Haghighat-ShishavanMasoud Nazarian-SamaniMahboobeh Nazarian-Samani노하경Seyed Farshid Kashani-Bozorg김광범
Keywords
black phosphorus; multiwall carbon nanotubes; energy storage; lithium; sodium
Issue Date
2018-06
Publisher
Journal of materials chemistry. A, Materials for energy and sustainability
Citation
VOL 6, NO 21-10134
Abstract
We report a new composite of black phosphorus and multiwall carbon nanotubes (BP– CNT) prepared via a surface oxidation-assisted chemical bonding procedure. The controlled air exposure successfully changed the naturally hydrophobic BP powder to the desired hydrophilicity, which was found indispensable to stable bond formation between the BP and the functionalized CNTs during ball milling. The BP– CNT composites were further fabricated into anodes for both Li- and Na-ion batteries, using a sodium carboxyl methyl cellulose– poly(acrylic acid) (NaCMC– PAA) binary polymeric binder. The hydrophilicity of BP also played a very important role in forming strong bonds with the hydroxyl groups of NaCMC and the carboxylic acid groups of PAA. The plausible mechanisms of stable bond formation were comprehensively examined, and the results revealed two types of strong connections: P– O– C bonds and dehydration cross links. Consequently, the material delivered outstanding electrochemical performance in the anode, with a high discharge capacity of 1681 mA h g− 1 after 400 cycles at a current density of 0.2C (1C = 2596 mA g− 1) for Li-ion batteries. It also successfully delivered a first discharge capacity of 2073 and 850 mA h g− 1 at 0.2C and 2C for Na-ion batteries, respectively, with excellent capacity retentions at both rates after 200 cycles. These salient results, which originated from the modified hydrophilic BP, will give further impetus to explore BP-based composites for use as high-performance materials for advanced energy storage applications.
URI
http://pubs.kist.re.kr/handle/201004/67740
ISSN
2050-7488
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KIST Publication > Article
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