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A Microporous Covalent–Organic Framework with Abundant Accessible Carbonyl Groups for Lithium‐Ion Batteries
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2018-06-21 , DOI: 10.1002/anie.201805540 Zhiqiang Luo 1 , Luojia Liu 1 , Jiaxin Ning 1 , Kaixiang Lei 1 , Yong Lu 1 , Fujun Li 1 , Jun Chen 1
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2018-06-21 , DOI: 10.1002/anie.201805540 Zhiqiang Luo 1 , Luojia Liu 1 , Jiaxin Ning 1 , Kaixiang Lei 1 , Yong Lu 1 , Fujun Li 1 , Jun Chen 1
Affiliation
A key challenge faced by organic electrodes is how to promote the redox reactions of functional groups to achieve high specific capacity and rate performance. Here, we report a two‐dimensional (2D) microporous covalent–organic framework (COF), poly(imide‐benzoquinone), via in situ polymerization on graphene (PIBN‐G) to function as a cathode material for lithium‐ion batteries (LIBs). Such a structure favors charge transfer from graphene to PIBN and full access of both electrons and Li+ ions to the abundant redox‐active carbonyl groups, which are essential for battery reactions. This enables large reversible specific capacities of 271.0 and 193.1 mAh g−1 at 0.1 and 10 C, respectively, and retention of more than 86 % after 300 cycles. The discharging/charging process successively involves 8 Li+ and 2 Li+ in the carbonyl groups of the respective imide and quinone groups. The structural merits of PIBN‐G will trigger more investigations into the designable and versatile COFs for electrochemistry.
中文翻译:
用于锂离子电池的具有丰富可及羰基基团的微孔共价有机框架
有机电极面临的关键挑战是如何促进官能团的氧化还原反应以实现高比容量和速率性能。在这里,我们报告了一种二维(2D)微孔共价有机骨架(COF),即聚(酰亚胺-苯并醌),通过在石墨烯上的原位聚合(PIBN-G)充当锂离子电池的正极材料( LIB)。这种结构有利于电荷从石墨烯转移至PIBN,并有利于电子和Li +离子完全进入丰富的氧化还原活性羰基,这对于电池反应至关重要。这实现了271.0和193.1 mAh g -1的大可逆比容量分别在0.1和10 C的温度下保持300次循环后的保留率超过86%。放电/充电过程依次在各自的酰亚胺基团和醌基团的羰基中涉及8个Li +和2个Li +。PIBN‐G的结构优点将触发对电化学可设计和通用COF的更多研究。
更新日期:2018-06-21
中文翻译:
用于锂离子电池的具有丰富可及羰基基团的微孔共价有机框架
有机电极面临的关键挑战是如何促进官能团的氧化还原反应以实现高比容量和速率性能。在这里,我们报告了一种二维(2D)微孔共价有机骨架(COF),即聚(酰亚胺-苯并醌),通过在石墨烯上的原位聚合(PIBN-G)充当锂离子电池的正极材料( LIB)。这种结构有利于电荷从石墨烯转移至PIBN,并有利于电子和Li +离子完全进入丰富的氧化还原活性羰基,这对于电池反应至关重要。这实现了271.0和193.1 mAh g -1的大可逆比容量分别在0.1和10 C的温度下保持300次循环后的保留率超过86%。放电/充电过程依次在各自的酰亚胺基团和醌基团的羰基中涉及8个Li +和2个Li +。PIBN‐G的结构优点将触发对电化学可设计和通用COF的更多研究。