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Kim Y, Yun J, Shin HS, Jung KN, Lee JW. Synergistic nanoarchitecture of mesoporous carbon and carbon nanotubes for lithium-oxygen batteries. NANO CONVERGENCE 2021; 8:17. [PMID: 34097156 PMCID: PMC8184898 DOI: 10.1186/s40580-021-00268-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Accepted: 05/26/2021] [Indexed: 05/15/2023]
Abstract
A rechargeable lithium-oxygen battery (LOB) operates via the electrochemical formation and decomposition of solid-state Li2O2 on the cathode. The rational design of the cathode nanoarchitectures is thus required to realize high-energy-density and long-cycling LOBs. Here, we propose a cathode nanoarchitecture for LOBs, which is composed of mesoporous carbon (MPC) integrated with carbon nanotubes (CNTs). The proposed design has the advantages of the two components. MPC provides sufficient active sites for the electrochemical reactions and free space for Li2O2 storage, while CNT forests serve as conductive pathways for electron and offer additional reaction sites. Results show that the synergistic architecture of MPC and CNTs leads to improvements in the capacity (~ 18,400 mAh g- 1), rate capability, and cyclability (~ 200 cycles) of the CNT-integrated MPC cathode in comparison with MPC.
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Affiliation(s)
- Yeongsu Kim
- Department of Materials Science and Engineering, Chosun University, 309 Pilmun-daero, Dong- gu, Gwangju, 61452, Republic of Korea
| | - Jonghyeok Yun
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu, 42988, Republic of Korea
| | - Hyun-Seop Shin
- New and Renewable Energy Institute, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea
| | - Kyu-Nam Jung
- New and Renewable Energy Institute, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea.
| | - Jong-Won Lee
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu, 42988, Republic of Korea.
- Energy Science and Engineering Research Center, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu, 42988, Republic of Korea.
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Groult H, Neveu S, Leclerc S, Porras-Gutierrez AG, Julien C, Tressaud A, Durand E, Penin N, Labrugere C. Nano-CoF 3 prepared by direct fluorination with F 2 gas: Application as electrode material in Li-ion battery. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2016.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Amatore C, Oleinick AI, Svir I. Diffusion from within a spherical body with partially blocked surface: diffusion through a constant surface area. Chemphyschem 2010; 11:149-58. [PMID: 19937904 DOI: 10.1002/cphc.200900646] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Diffusion from spherical bodies has been a subject of interest since the earliest times of modern sciences and a few equivalent analytical formulations of the problem are taught in engineering textbooks dealing with cooling rates of hot spheres. However, all these former studies assume that the diffusing material is transferable to/from the surrounding space through the whole surface of the spherical body. Conversely, the development of nanoscience and the improved knowledge of microscopic biological events have evidenced that diffusion from spherical bodies is a ubiquitous problem. It often occurs in situations where the nanosphere surfaces are not isotropic and partly impermeable to diffusing materials. This work elaborates on this issue and theoretically establishes that--with some specific allowance--the basic analytical equation of diffusion from/to fully accessible spherical bodies may be used.
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Affiliation(s)
- Christian Amatore
- Département de Chimie, Ecole Normale Supérieure, UMR CNRS-ENS-UPMC 8640 Pasteur, 24 rue Lhomond, 75231 Paris Cedex 05, France.
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