Willow-Leaf-Like ZnSe@N-Doped Carbon Nanoarchitecture as a Stable and High-Performance Anode Material for Sodium-Ion and Potassium-Ion Batteries

被引:142
作者
Dong, Caifu [1 ]
Wu, Leqiang [1 ]
He, Yanyan [2 ]
Zhou, Yanli [1 ]
Sun, Xiuping [3 ]
Du, Wei [1 ]
Sun, Xueqin [1 ]
Xu, Liqiang [3 ]
Jiang, Fuyi [1 ]
机构
[1] Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Peoples R China
[2] Qilu Univ Technol, Shandong Acad Sci, Sch Chem & Pharmaceut Engn, Key Lab Fine Chem Univ Shandong, Jinan 250353, Peoples R China
[3] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China
基金
中国国家自然科学基金;
关键词
long cycle life; potassium‐ ion batteries; sodium‐ willow‐ leaf‐ like composites; ZnSe; NANOPARTICLES; NANOSHEETS; COMPOSITE; NANOFIBERS; HYBRID;
D O I
10.1002/smll.202004580
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
ZnSe is regarded as a promising anode material for energy storage due to its high theoretical capacity and environment friendliness. Nevertheless, it is still a significant challenge to obtain superior electrode materials with stable performance owing to the serious volume change and aggregation upon cycling. Herein, a willow-leaf-like nitrogen-doped carbon-coated ZnSe (ZnSe@NC) composite synthesized through facile solvothermal and subsequent selenization process is beneficial to expose more active sites and facilitate the fast electron/ion transmission. These merits significantly enhance the electrochemical performances of ZnSe@NC for sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). The obtained ZnSe@NC exhibits outstanding rate performance (440.3 mAh g(-1) at 0.1 A g(-1) and 144.4 mAh g(-1) at 10 A g(-1)) and ultralong cycle stability (242.2 mAh g(-1) at 8.0 A g(-1) even after 3200 cycles) for SIBs. It is noted that 106.5 mAh g(-1) can be retained after 550 cycles and 71.4 mAh g(-1) is still remained after 1500 cycles at 200 mA g(-1) when applied as anode for PIBs, indicating good cycle stability of the electrode. The possible electrochemical mechanism and the ionic diffusion kinetics of the ZnSe@NC are investigated using ex situ X-ray diffraction, high-resolution transmission electron microscopy, and a series of electrochemical analyses.
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页数:11
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