An effective tellurium surface modification strategy to enhance the capacity and rate capability of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode material

Annam Butt; Sidra Jamil; Muhammad Fasehullah; Haseeb Ahmad; Muhammad Khurram Tufail; Rehana Sharif; Ghulam Ali

doi:10.1016/j.heliyon.2024.e28039

An effective tellurium surface modification strategy to enhance the capacity and rate capability of Ni-rich LiNi_0.8Co_0.1Mn_0.1O₂ cathode material

Heliyon. 2024 Mar 15;10(7):e28039. doi: 10.1016/j.heliyon.2024.e28039. eCollection 2024 Apr 15.

Authors

Annam Butt¹, Sidra Jamil², Muhammad Fasehullah³, Haseeb Ahmad⁴, Muhammad Khurram Tufail⁵, Rehana Sharif¹, Ghulam Ali⁴

Affiliations

¹ Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan.
² Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, School of Materials and Energy, Southwest University, Chongqing, 400715, PR China.
³ State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, PR China.
⁴ U.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Science and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan.
⁵ College of Materials Science and Engineering, College of Physics, Qingdao University, Qingdao, 266071, PR China.

Abstract

LiNi_0.8Co_0.1Mn_0.1O₂ (NCM) layered oxide is contemplated as an auspicious cathode candidate for commercialized lithium-ion batteries. Regardless, the successful commercial utilization of these materials is impeded by technical issues like structural degradation and poor cyclability. Elemental doping is among the most viable strategies for enhancing electrochemical performance. Herein, the preparation of surface tellurium-doped NCM is done by utilizing the methodology solid-state route at high temperatures. Surface doping of the Te ions leads to structural stability owing to the inactivation of oxygen at the surface via the binding of slabs of transition metal-oxygen. Remarkably, 1 wt% of Te doping in NCM exhibits enhanced electrochemical characteristics with an excellent discharge capacity, i.e., 225.8 mAh/g (0.1C), improved rate-capability of 156 mAh/g (5C) with 82.2% retention in capacity (0.5C) over 100 cycles within 2.7-4.3V as compared to all other prepared electrodes. Hence, the optimal doping of Te is favorable for enhancing capacity, cyclability along with rate capability of NCM.

Keywords: Cathode material; Hydrothermal; Lithium-ion batteries; NCM; Te doping.