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A high‐performance composite positive electrode based on graphene and Li (Ni 1/3 Co 1/3 Mn 1/3 )O 2
Author(s) -
Guler Aslihan,
Gungor Hatice,
Ozcan Seyma,
Coban Aslan,
Guler Mehmet Oguz,
Akbulut Hatem
Publication year - 2018
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4198
Subject(s) - graphene , materials science , electrode , anode , graphite , cathode , lithium (medication) , electrochemistry , composite number , chemical engineering , current collector , graphene foam , conductivity , metal , nanotechnology , copper , composite material , graphene oxide paper , metallurgy , chemistry , medicine , endocrinology , engineering , electrolyte
Summary The cathode electrodes in commercial Li‐ion cells are usually coated on aluminum foils, while the anode part is coated on copper current collector. However, these metallic foils of the electrodes are relatively heavy counterparts when compared with the total cell weight. To overcome this issue, we comparatively studied LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC); NMC/graphene positive electrodes reinforced with graphene were produced in the form of freestanding electrodes by a facile sol‐gel and vacuum filtration method. To confirm our results obtained with the half‐cells, graphite@NMC@graphene full‐cells were also produced and a specific capacity of 220 mAh g −1 after 250 cycles. Extraordinary electrochemical cycling, high conductivity, and enhanced rate properties are obtained by anchoring the NMC particles between the graphene layers. The results have also indicated that the freestanding graphene‐based electrodes could be a useful tool for high‐capacity lithium‐ion batteries.