Anchoring Nickel and Stabilizing Oxygen in Coherent LiNiO <sub>2</sub> @LiFePO <sub>4</sub> Composite Cathode Materials for Rechargeable Lithium‐Ion Batteries
Abstract
Abstract LiNiO 2 is an appealing cathode material for Li‐ion batteries because of high energy density and low cost but suffers from irreversible phase transition and surface instability. Herein, a ball‐milled LiNiO 2 @LiFePO 4 composite with oriented coherent combination is reported with enhanced structural stability and Li + diffusion. The coherent oriented channels are demonstrated to favor the reversible and rapid Li + intercalation during the H2‐H3 phase transition, which significantly alleviates structural strain accumulation. The covalent P─O bonds anchored on the LiNiO 2 surface stabilizes the Ni sites, mitigating surface reconstruction and lattice oxygen loss. The LiNiO 2 @LiFePO 4 cathode exhibits a specific capacity of 210 mAh g −1 and an initial Coulombic efficiency of 93.7% at 0.1 C, along with a remarkable rate capability of 156 mAh g −1 at 10 C. Furthermore, the full cells pairing LiNiO 2 @LiFePO 4 cathode and graphite anode deliver a considerable energy density over 280 Wh kg −1 and a remarkable capacity retention. This study offers an effective approach of phosphate coalesce to upgrade high‐capacity nickel‐rich oxide cathode materials.
Article Details
Authors (11)
Zhichen Hou
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Wanying Wang
College of Electronic Information and Optical Engineering
Meng Yao
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Kuiming Liu
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Fanqi Kong
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Xinhui Huang
State Key Laboratory of Advanced Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High‐efficiency Energy Storage (Ministry of Education), College of Chemistry Nankai University Tianjin 300071 China
Yue Li
Guoyu Ding
State Key Laboratory of Advanced Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High‐efficiency Energy Storage (Ministry of Education), College of Chemistry Nankai University Tianjin 300071 China
Meng Yu
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry
Weichao Wang
College of Electronic Information and Optical Engineering
Fangyi Cheng
State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Engineering Research Center of High-efficiency Energy Storage (Ministry of Education), Frontiers Science Center for New Organic Matter (Ministry of Education), College of Chemistry