Simultaneous Catalytic Construction of Closed‐Pore‐Rich Hard Carbon Anode and Generation of Na 0.67 Ni 0.2 Fe 0.2 Mn 0.6 O 2 Cathode for Sodium‐Ion Batteries
Year: 2025
Type: article
Abstract: Sodium‐ion battery (SIB) has been regarded as a promising electrochemical device for stationary energy storage, whereas its widespread application is still hindered by relatively lower energy density and unredeemed cost‐effectiveness. High‐capacity anode materials are one of the bottlenecks limiting the improvement of energy density of SIBs, while tuning the closed porous structure is the most efficient approach to boost the plateau capacity. Unfortunately, simple and practical closed‐pore‐forming strategies remain scarce. Herein, a transition metal oxide catalytic strategy to prepare closed‐pore‐rich hard carbon anode for the first time while simultaneously transforming the catalyst into layered oxide cathode is reported. The abundant closed‐pore structure provides an augmented array of sites for sodium ion storage, thereby contributing to a heightened plateau capacity and Coulombic efficiency. Hence, the obtained anode delivers a reversible capacity of 301.6 mAh g −1 with a high initial coulombic efficiency of 92.3%. Note that a capacity retention of 98.4% is achieved after 300 cycles. In particular, a full cell constructed by the above closed‐pore‐rich hard carbon anode and layered oxide cathode demonstrates favorable energy density and cycling stability. This work is believed to provide a green and sustainable route for achieving high‐performance SIB electrode materials.
Source: Batteries & Supercaps
Authors: Tianzhuo Wen, Shimin Yan, Liangyu Li, Yan Ding, Jing Li, Zhongxue Chen
Institutions: Wuhan University, Ningxia University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Award: G5878610986
OpenAlex ID: W4415837645