dc.contributor.author | Li, Xianglin | |
dc.contributor.author | Wang, Fangzhou | |
dc.date.accessioned | 2019-11-15T19:10:02Z | |
dc.date.available | 2019-11-15T19:10:02Z | |
dc.date.issued | 2018-06-20 | |
dc.identifier.citation | ACS Omega 2018, 3, 6, 6006-6012 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/29780 | |
dc.description.abstract | The wettability of customized Li−O2 battery electrodes is
altered by mixing acetylene black carbon particles with various binders. The
wettability of the electrode can be characterized by the static contact angles
between the electrode surface and nonaqueous electrolyte, which is 1 M
bis(trifluoromethane)sulfonimide lithium salt (LiTFSI) dissolved in
tetraethylene glycol dimethyl ether, and the double-layer capacitance
measured by the cyclic voltammetry. Results show that electrodes
containing poly(vinylidene difluoride) (PVDF) binder are lyophilic and
increasing the fraction of poly(tetrafluoroethylene) (PTFE) increases the
lyophobicity of electrodes. Li−O2 batteries are discharged at 0.1 mA/cm2
with the cut-off voltage of 2.0 V. The discharge capacity of the electrode
with 15% PVDF (36.5°) carbon coatings is 1665.8 mAh/g, whereas the
customized electrode with 15% PTFE (128.4°) carbon coatings obtains the
discharge capacity of 4160.8 mAh/g. However, the discharge capacity
decreases to 3109.5 and 2822.9 mAh/g as the PTFE content further increases to 25% (135.5°) and 35% (138.5°), respectively.
The electrode composed of two lyophobic carbon coatings on top and bottom and one lyophilic carbon coating in the middle
has the static contact angle of 118.8° and acquires the highest specific discharge capacity of 5149.5 mAh/g. | en_US |
dc.publisher | American Chemical Society | en_US |
dc.rights | This is an open access article published under an ACS AuthorChoice License, which permits
copying and redistribution of the article or any adaptations for non-commercial purposes. | en_US |
dc.rights.uri | https://pubs.acs.org/page/policy/authorchoice_termsofuse.html | en_US |
dc.title | Effects of the Electrode Wettability on the Deep Discharge Capacity of Li–O2 Batteries | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Li, Xianglin | |
kusw.kuauthor | Wang, Fangzhou | |
kusw.kudepartment | Mechanical Engineering | en_US |
dc.identifier.doi | 10.1021/acsomega.8b00808 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0002-0193-9410 | en_US |
kusw.oaversion | Scholarly/refereed, author accepted manuscript | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |