Graphene-Armored Aluminum Foil with Enhanced Anticorrosion Performance as Current Collectors for Lithium-Ion Battery

Mingzhan Wang; Miao Tang; Shulin Chen; Haina Ci; Kexin Wang; Liurong Shi; Li Lin; Huaying Ren; Jingyuan Shan; Peng Gao; Zhongfan Liu; Hailin Peng

doi:10.1002/adma.201703882

Graphene-Armored Aluminum Foil with Enhanced Anticorrosion Performance as Current Collectors for Lithium-Ion Battery

Adv Mater. 2017 Dec;29(47). doi: 10.1002/adma.201703882. Epub 2017 Oct 27.

Authors

Mingzhan Wang¹, Miao Tang¹, Shulin Chen^{1

2

3}, Haina Ci^{1

4}, Kexin Wang¹, Liurong Shi¹, Li Lin¹, Huaying Ren^{1

4}, Jingyuan Shan^{1

4}, Peng Gao^{1

2}, Zhongfan Liu^{1

5}, Hailin Peng^{1

5}

Affiliations

¹ Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.
² Electron Microscopy Laboratory and International Centre for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China.
³ State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, P. R. China.
⁴ Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, P. R. China.
⁵ Beijing Graphene Institute (BGI), Beijing, 100094, P. R. China.

PMID: 29076181
DOI: 10.1002/adma.201703882

Abstract

Aluminum (Al) foil, as the most accepted cathode current collector for lithium-ion batteries (LIBs), is susceptible to local anodic corrosions during long-term operations. Such corrosions could lead to the deterioration or even premature failure of the batteries and are generally believed to be a bottleneck for next-generation 5 V LIBs. Here, it is demonstrated that Al foil armored by conformal graphene coating exhibits significantly reinforced anodic corrosion resistance in both LiPF₆ and lithium bis(trifluoromethanesulphonyl) imide (LiTFSI) based electrolytes. Moreover, LiMn₂ O₄ cells using graphene-armored Al foil as current collectors (LMO/GA) demonstrate enhanced electrochemical performance in comparison with those using pristine Al foil (LMO/PA). The long-term discharge capacity retention of LMO/GA cell after ≈950 h straight operations at low rate (0.5 C) reaches up to 91%, remarkably superior to LMO/PA cell (75%). The self-discharge propensity of LMO/GA is clearly relieved and the rate/power performance is also improved with graphene mediations. This work not only contributes to the long-term stable operations of LIBs but also might catalyze the deployment of 5 V LIBs in the future.

Keywords: aluminum foil; anti-corrosion; current collectors; graphene; lithium-ion batteries.