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From Checkerboard‐Like Sand Barriers to 3D Cu@CNF Composite Current Collectors for High‐Performance Batteries
Advanced Science ( IF 14.3 ) Pub Date : 2018-03-27 , DOI: 10.1002/advs.201800031 Jian Luo 1 , Wei Yuan 1 , Shimin Huang 1 , Bote Zhao 2 , Yu Chen 2 , Meilin Liu 2 , Yong Tang 1
Advanced Science ( IF 14.3 ) Pub Date : 2018-03-27 , DOI: 10.1002/advs.201800031 Jian Luo 1 , Wei Yuan 1 , Shimin Huang 1 , Bote Zhao 2 , Yu Chen 2 , Meilin Liu 2 , Yong Tang 1
Affiliation
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While the architecture, surface morphology, and electrical conductivity of current collectors may significantly affect the performance of electrochemical cells, many challenges still remain in design and cost‐effective fabrication of highly efficient current collectors for a new generation of energy storage and conversion devices. Here the findings in design and fabrication of a 3D checkerboard‐like Cu@CNF composite current collector for lithium‐ion batteries are reported. The surface of the current collector is modified with patterned grooves and amorphous carbon nanofibers, imitating the checkerboard‐like sand barriers in desert regions. Due to a combined effect of the grooves and the carbon nanofibers, a battery based on this current collector retains a reversible capacity of 410.1 mAh g−1 (beyond the theoretical capacity of carbonaceous materials of 372 mAh g−1) with good capacity retention (greater than 84.9% of the initial capacity after 50 cycles), resulting in 66.2% and 42.6% improvement in reversible capacity and capacity retention, respectively, compared to the batteries using traditional Cu current collectors. Based on the excellent electrochemical performance, this composite current collector is believed to be an attractive alternative to the traditional commercially used current collectors for the anode of high‐power energy storage systems.
中文翻译：
从棋盘状阻沙层到用于高性能电池的3D Cu @ CNF复合集电器
尽管集电器的结构，表面形态和电导率可能会显着影响电化学电池的性能，但在新一代储能和转换设备的高效集电器的设计和具有成本效益的制造方面仍然存在许多挑战。在此报告了设计和制造用于锂离子电池的3D棋盘状Cu @ CNF复合集电器的发现。集电器的表面经过修饰，带有图案化的凹槽和无定形碳纳米纤维，模仿了沙漠地区类似棋盘格的防沙层。由于凹槽和碳纳米纤维的共同作用，基于该集电器的电池保留了410.1 mAh g -1的可逆容量。（超过含碳材料的理论容量372 mAh g -1），并具有良好的容量保持能力（大于50个循环后的初始容量的84.9％），分别使可逆容量和容量保持能力分别提高了66.2％和42.6％，与使用传统铜集电器的电池相比。基于出色的电化学性能，该复合集电器被认为是用于大功率储能系统阳极的传统商用集电器的有吸引力的替代品。
更新日期：2018-03-27
中文翻译：
从棋盘状阻沙层到用于高性能电池的3D Cu @ CNF复合集电器
尽管集电器的结构，表面形态和电导率可能会显着影响电化学电池的性能，但在新一代储能和转换设备的高效集电器的设计和具有成本效益的制造方面仍然存在许多挑战。在此报告了设计和制造用于锂离子电池的3D棋盘状Cu @ CNF复合集电器的发现。集电器的表面经过修饰，带有图案化的凹槽和无定形碳纳米纤维，模仿了沙漠地区类似棋盘格的防沙层。由于凹槽和碳纳米纤维的共同作用，基于该集电器的电池保留了410.1 mAh g -1的可逆容量。（超过含碳材料的理论容量372 mAh g -1），并具有良好的容量保持能力（大于50个循环后的初始容量的84.9％），分别使可逆容量和容量保持能力分别提高了66.2％和42.6％，与使用传统铜集电器的电池相比。基于出色的电化学性能，该复合集电器被认为是用于大功率储能系统阳极的传统商用集电器的有吸引力的替代品。
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