Slope-Dominated Carbon Anode with High Specific Capacity and Superior Rate Capability for High Safety Na-Ion Batteries

Yuruo Qi; Yaxiang Lu; Feixiang Ding; Qiangqiang Zhang; Hong Li; Xuejie Huang; Liquan Chen; Yong-Sheng Hu

doi:10.1002/anie.201900005

Slope-Dominated Carbon Anode with High Specific Capacity and Superior Rate Capability for High Safety Na-Ion Batteries

Angew Chem Int Ed Engl. 2019 Mar 22;58(13):4361-4365. doi: 10.1002/anie.201900005. Epub 2019 Feb 27.

Authors

Yuruo Qi^{1

2}, Yaxiang Lu^{1

2}, Feixiang Ding^{1

2}, Qiangqiang Zhang^{1

2}, Hong Li^{1

2}, Xuejie Huang^{1

2}, Liquan Chen^{1

2}, Yong-Sheng Hu^{1

2}

Affiliations

¹ Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
² Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.

PMID: 30710402
DOI: 10.1002/anie.201900005

Abstract

The comprehensive performance of carbon anodes for Na-ion batteries (NIBs) is largely restricted by their inferior rate capability and safety issues. Herein, a slope-dominated carbon anode is achieved at a low temperature of 800 °C, which delivers a high reversible capacity of 263 mA h g^-1 at 0.15C with an impressive initial Coulombic efficiency (ICE) of 80 %. When paired with the NaNi_1/3 Fe_1/3 Mn_1/3 O₂ cathode, the reversible capacity at 6C is still 75 % of that at 0.15C, and 73 % of the capacity is retained after 1000 cycles at 3C. The enhanced Na storage performance could be attributed to the unique microstructure with randomly oriented short carbon layers and the relatively higher defect concentration. Given its robustness, such a low-temperature carbonization strategy could also be applicable to other precursors and provide a new opportunity to design slope-dominated carbon anodes for high safety, low-cost NIBs with excellent ICE and superior rate capability.

Keywords: Na-ion batteries; carbon anode; high safety; rate capability; slope-dominated.

Abstract

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