Core–Shell Aluminum@Carbon Nanospheres for Dual‐Ion Batteries with Excellent Cycling Performance under High Rates. Issue 6 (11th October 2017)

• Record Type: Journal Article
• Authors: Tong, Xuefeng; Zhang, Fan; Chen, Guanghai; Liu, Xinyu; Gu, Lin; Tang, Yongbing
• Is Part Of: Advanced energy materials. Volume 8:Issue 6(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-10-11
• Subjects: aluminum@carbon nanospheres -- anion intercalation -- anode -- dual‐ion batteries; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201701967
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Dual‐ion battery (DIB) has been proposed as a novel energy storage device with the merits of high safety, low cost and environmental friendliness. Herein, we have developed core/shell aluminum@carbon nanospheres (nAl@C) as anode material for DIB. The nanoscale framework is composed of an Al nanosphere and an amorphous carbon outer layer that is conductive and protective, facilitating the formation of a stable SEI film during cycling. Owing to the core‐shell structural design, the nAl@C nanospheres demonstrate significantly enhanced electrochemical performance in a nAl@C‐graphite DIB. The DIB exhibites high rate performance as well as superior cycling stability with a capacity of 88 mA h g ‐1 with 94.6% capacity retention and high Coulombic efficiency (> 99.5%) after 1000 cycles at a high current rate of 15 C. In addition, the nAl@C‐G DIB deliveres an ultrahigh specific energy of 148 W h kg ‐1 at a high power density of 3701 W kg ‐1, which is much better than most commercial lithium‐ion batteries. Abstract : Nanoaluminum@carbon (nAl@C) core–shell nanospheres are developed as a new anode material for dual‐ion batteries (DIBs). The DIB exhibits a high rate capability and superior cycling stability with 94.6% capacity retention after 1000 cycles at 15 C, which also achieves a high specific energy of 148 W h kg –1 at 3701 W kg –1, better than most conventional lithium‐ion batteries.