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Highly Conductive, Lightweight, Low‐Tortuosity Carbon Frameworks as Ultrathick 3D Current Collectors
Author(s) -
Chen Chaoji,
Zhang Ying,
Li Yiju,
Kuang Yudi,
Song Jianwei,
Luo Wei,
Wang Yanbin,
Yao Yonggang,
Pastel Glenn,
Xie Jia,
Hu Liangbing
Publication year - 2017
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201700595
Subject(s) - materials science , current collector , tortuosity , electrode , energy storage , carbonization , carbon fibers , lithium (medication) , lithium iron phosphate , electrical conductor , battery (electricity) , nanotechnology , current (fluid) , composite material , chemical engineering , electrical engineering , electrochemistry , porosity , electrolyte , scanning electron microscope , medicine , power (physics) , chemistry , physics , engineering , quantum mechanics , composite number , endocrinology
The growing demand for advanced energy storage techniques and devices has driven the energy storage market to strive for higher performance, longer cycling life, and better safety. Thick electrode design enabling more electroactive materials has the potential to significantly improve the energy density on device level yet faces major challenges of slow ion transport and high deformability. Here, inspired by natural wood materials with aligned channels along the tree growth direction, a highly conductive, lightweight, and low‐tortuosity carbon framework (CF) directly carbonized from natural wood as an ultrathick 3D current collector is demonstrated. Benefiting from the uniqueness of the multichanneled CF, an ultrathick 3D electrode of lithium iron phosphate filled carbon framework with a large thickness of 800 µm and active material mass loading of 60 mg cm −2 delivers a rational capacity of 7.6 mAh cm −2 (95 Ah L −1 based on volume), long cycling life, and lower deformability with enhanced mechanical properties. This work presents a design concept for thick electrode toward high performance energy storage devices that are not limited to lithium‐ion batteries.