Three-dimensional printed lithium iron phosphate coated with magnesium oxide cathode with improved areal capacity and ultralong cycling stability for high performance lithium-ion batteries

Jean Pierre Mwizerwa; Changyong Liu; Kun Xu; Ning Zhao; Yide Li; Zhangwei Chen; Jun Shen

doi:10.1016/j.jcis.2022.05.030

Three-dimensional printed lithium iron phosphate coated with magnesium oxide cathode with improved areal capacity and ultralong cycling stability for high performance lithium-ion batteries

J Colloid Interface Sci. 2022 Oct:623:168-181. doi: 10.1016/j.jcis.2022.05.030. Epub 2022 May 10.

Authors

Jean Pierre Mwizerwa¹, Changyong Liu², Kun Xu³, Ning Zhao³, Yide Li³, Zhangwei Chen⁴, Jun Shen⁴

Affiliations

¹ Additive Manufacturing Institute, College of Mechatronics & Control Engineering, Shenzhen University, Shenzhen 518060, China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
² Additive Manufacturing Institute, College of Mechatronics & Control Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots, College of Mechatronics & Control Engineering, Shenzhen University, 518060, China. Electronic address: liuchangyong@szu.edu.cn.
³ Additive Manufacturing Institute, College of Mechatronics & Control Engineering, Shenzhen University, Shenzhen 518060, China.
⁴ Additive Manufacturing Institute, College of Mechatronics & Control Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots, College of Mechatronics & Control Engineering, Shenzhen University, 518060, China.

PMID: 35576648
DOI: 10.1016/j.jcis.2022.05.030

Abstract

Three-dimensional (3D) printing of Li-ion batteries with unconventional 3D electrodes has attracted considerable attention in recent years. However, fabricating 3D electrodes with high specific capacity, high areal capacity, ultralong cycling stability, and improved rate performance remains a challenge to date. Novel 3D grid-patterned LiFePO₄@MgO composite electrodes with thicknesses of 143, 306, and 473 μm were fabricated via 3D printing. The electrochemical performance of half cells was evaluated. The 3D-printed LiFePO₄@MgO (143 μm) electrodes exhibit stable specific capacities of 142.8 mAh g^-1 @ 1.0 C and 90.3 mAh g^-1 @ 10.0 C after 800 and 1700 cycles, respectively. In addition, the 473 μm-thick 3D grid-patterned LiFePO₄@MgO achieves an areal capacity of 3.01 mAh cm^-2 @ 0.1 C after 20 cycles. The full cells comprised 143 μm-thick 3D-printed LiFePO₄@MgO, and 217 μm Li₄Ti₅O₁₂ electrodes show a capacity of 139.0 mAh g^-1 @ 1.0 C after 400 cycles. These results indicate that, this type of thick 3D-printed LiFePO₄@MgO electrode achieves high capacity, high-rate capability, and ultralong cycle stability. The outstanding performance ascribes the fast electrolyte infusion of 3D-printed electrodes and the enhanced electronic/ionic transport.

Keywords: 3D-printing; Direct ink writing; LiFePO(4)@MgO composite; Long cycling stability.