Optimization of the preparation conditions for pitch based anode to enhance the electrochemical properties of LIBs

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 73; pp. 241 - 247
• Main Authors: Han, Yu Jin, Hwang, Jin Ung, Kim, Kyoung Soo, Kim, Ji Hong, Lee, Jong Dae, Im, Ji Sun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.05.2019; 한국공업화학회
• Subjects: Capacity retention; Discharge capacity; Lithium ion battery; Optimum thermal conditions; PFO-based pitch; 화학공학; Discharge capacity; Capacity retention; Lithium ion battery; Optimum thermal conditions; PFO-based pitch
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2019.01.031

[Display omitted] The anode of a lithium ion battery was prepared by the thermal treatment of PFO (pyrolysis fuel oil) utilizing the following three steps: PFO→pitch→coke→anode. The PFO-based pitch with a high softening point exhibited high discharge capacity and Coulombic efficiency because of turbostratic disorder within the disordered structures. A two-step intermediate heating process during the (pitch→coke) reaction induced the remaining relatively light components to participate in condensation/cross-linking reactions during anode formation (coke→anode). The intermediate heating provided a high discharge capacity and a first-cycle Coulombic efficiency based on a well-ordered and suitable micropore structure for lithium storage sites.