Modification of aluminum current collectors with laser-scribed graphene for enhancing the performance of lithium ion batteries

JOURNAL OF POWER SOURCES

卷:506

Article

Cho, Er-Chieh¹  Chang-Jian, Cai-Wan²  Wu, Yen-Ju³  Chao, Szu-Han⁴  Huang, Jen-Hsien⁵  Lee, Kuen-Chan⁶  Weng, Huei Chu⁷  Hsu, Shih-Chieh^4,8 

[1] Taipei Med Univ, Sch Pharm, Dept Clin Pharm, Coll Pharm, 250 Wuxing St, Taipei 110, Taiwan

[2] I Shou Univ, Dept Mech & Automat Engn, 1 Sec 1,Syuecheng Rd, Kaohsiung 84001, Taiwan

[3] Natl Inst Mat Sci NIMS, Int Ctr Young Sci ICYS, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[4] Tamkang Univ, Dept Chem & Mat Engn, 151,Yingzhuan Rd, Tamsui 25137, Taiwan

[5] CPC Corp, Green Technol Res Inst, Dept Green Mat Technol, 2 Zuonan Rd, Kaohsiung 81126, Taiwan

[6] Natl Taipei Univ Educ, Dept Sci Educ, 134 Sec 2,Heping E Rd, Taipei 106, Taiwan

[7] Chung Yuan Christian Univ, Dept Mech Engn, 200 Chungpei Rd, Chungli 32023, Taiwan

[8] Tamkang Univ, Water Treatment Sci & Technol Res Ctr, 151 Yingzhuan Rd, Tamsui 25137, Taiwan

关键词: Graphene;    Laser irradiation;    Current collector;    Lithium ion battery;   

DOI  :  10.1016/j.jpowsour.2021.230060

来源: Elsevier

【 摘 要 】

In this study, the graphene-modified Al foils are prepared to assemble lithium ion batteries (LIBs) through a three-step approach comprising: (1) deposition of the polyamic acid (PAA) on the Al substrate; (2) curing the PAA to form the polyimide (PI)-coated Al foils; (3) converting the PI into porous graphene by CO2 laser irradiation. With integration of the PI derived graphene (PDG) in the LIBs, the inserted PDG layer can enhance the adhesion and interface resistance between the active layer and Al electrode. The LiNi0.5Mn1.5O4 (LNMO)//Li4Ti5O12 (LTO) full cells with PDG layer are also fabricated to evaluate the effect of the modified layer on the cell performance. Compared to the pristine Al electrode, the modified current collector can improve the rate performance and reduce the temperature rise during the charge/discharge process leading to better cycling stability.

【 授权许可】

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