PMID- 34138139 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210624 IS - 2150-5551 (Electronic) IS - 2311-6706 (Print) IS - 2150-5551 (Linking) VI - 12 IP - 1 DP - 2020 Jun 25 TI - A Novel Strategy of In Situ Trimerization of Cyano Groups Between the Ti(3)C(2)T(x) (MXene) Interlayers for High-Energy and High-Power Sodium-Ion Capacitors. PG - 135 LID - 10.1007/s40820-020-00473-7 [doi] LID - 135 AB - 2D MXenes are attractive for energy storage applications because of their high electronic conductivity. However, it is still highly challenging for improving the sluggish sodium (Na)-ion transport kinetics within the MXenes interlayers. Herein, a novel nitrogen-doped Ti(3)C(2)T(x) MXene was synthesized by introducing the in situ polymeric sodium dicyanamide (Na-dca) to tune the complex terminations and then utilized as intercalation-type pseudocapacitive anode of Na-ion capacitors (NICs). The Na-dca can intercalate into the interlayers of Ti(3)C(2)T(x) nanosheets and simultaneously form sodium tricyanomelaminate (Na(3)TCM) by the catalyst-free trimerization. The as-prepared Ti(3)C(2)T(x)/Na(3)TCM exhibits a high N-doping of 5.6 at.% in the form of strong Ti-N bonding and stabilized triazine ring structure. Consequently, coupling Ti(3)C(2)T(x)/Na(3)TCM anode with different mass of activated carbon cathodes, the asymmetric MXene//carbon NICs are assembled. It is able to deliver high energy density (97.6 Wh kg(-1)), high power output (16.5 kW kg(-1)), and excellent cycling stability ( approximately 82.6% capacitance retention after 8000 cycles). FAU - Liu, Siyang AU - Liu S AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Hu, Fangyuan AU - Hu F AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. hufangyuan@dlut.edu.cn. FAU - Shao, Wenlong AU - Shao W AD - State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Zhang, Wenshu AU - Zhang W AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Zhang, Tianpeng AU - Zhang T AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Song, Ce AU - Song C AD - School of Mathematical Sciences, Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Yao, Man AU - Yao M AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Huang, Hao AU - Huang H AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. FAU - Jian, Xigao AU - Jian X AD - School of Materials Science and Engineering, State Key Laboratory of Fine Chemicals, Key Laboratory of Energy Materials and Devices (Liaoning Province), Dalian University of Technology, Dalian, 116024, People's Republic of China. jian4616@dlut.edu.cn. AD - State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Dalian University of Technology, Dalian, 116024, People's Republic of China. jian4616@dlut.edu.cn. AD - School of Mathematical Sciences, Dalian University of Technology, Dalian, 116024, People's Republic of China. jian4616@dlut.edu.cn. LA - eng PT - Journal Article DEP - 20200625 PL - Germany TA - Nanomicro Lett JT - Nano-micro letters JID - 101727940 PMC - PMC7770942 OTO - NOTNLM OT - Fast kinetics OT - MXene OT - Nitrogen doping OT - Sodium-ion capacitors OT - Triazine polymerization EDAT- 2021/06/18 06:00 MHDA- 2021/06/18 06:01 PMCR- 2020/06/25 CRDT- 2021/06/17 12:44 PHST- 2020/03/31 00:00 [received] PHST- 2020/06/08 00:00 [accepted] PHST- 2021/06/17 12:44 [entrez] PHST- 2021/06/18 06:00 [pubmed] PHST- 2021/06/18 06:01 [medline] PHST- 2020/06/25 00:00 [pmc-release] AID - 10.1007/s40820-020-00473-7 [pii] AID - 473 [pii] AID - 10.1007/s40820-020-00473-7 [doi] PST - epublish SO - Nanomicro Lett. 2020 Jun 25;12(1):135. doi: 10.1007/s40820-020-00473-7.