An Electrode‐Less Fiber Battery With 600 Wh/L‐Level Volumetric Energy Density Enabled by Dynamic Deposition Chemistry
Abstract
ABSTRACT Aqueous fiber batteries are essential for next‐generation wearable electronics due to their inherent safety, low cost, and environmental friendliness. However, the low volumetric energy density (<100 Wh/L), stemming from the contradiction of insufficient spatial utilization and limited flexibility inherent to the pre‐coated fiber electrodes, significantly hinders their practical applications. Here, we introduce an ultrathin, electrode‐less fiber battery based on the dynamic deposition chemistry to decouple volumetric energy density from mechanical robustness. This battery addresses the core inefficiency of pre‐coated fiber batteries through dynamic deposition chemistry that dissolves redox‐active materials directly into the electrolyte, thereby eliminating the need for pre‐coated electrodes. This intrinsic design minimizes inactive material volume and facilitates on‐demand electrochemical deposition during operation. Thus, the resulting fiber battery achieves a high volumetric energy density of 612 Wh/L and an ultrathin diameter of 130 µm. Furthermore, its dynamic stiffness is reduced by three orders of magnitude compared to pre‐coated counterparts. This study unveils a new technological pathway for fiber batteries with high volumetric energy density. Simultaneously, it establishes a novel, material‐efficient architectural paradigm that seamlessly integrates into high‐performance textiles, enabling future wearable devices.
Article Details
Authors (23)
Longmei Ma
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
Kun Zhang
Zhe Yang
Yi Jiang
Siwei Cao
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
You Pan
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
Chuang Wang
Qinhao Du
Shuxian Pang
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
Jiaxin Li
Haixin Yao
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
Xiaocheng Gong
Jiahe Qu
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
Tianrui Li
Yanan Zhang
Yiqing Cheng
State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices Department of Chemistry Fudan University Shanghai China
Yuxuan Zhou
Fengliang Liu
Department of Physics, School of Physics and Materials Science, Nanchang University 1 , Nanchang 330031,
Meng Liao
Chen Zhao
Yonggang Wang
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, College of Smart Materials and Future Energy, Laboratory of Advanced Materials
Huisheng Peng
Bingjie Wang