Nitrogen-doped hierarchically porous carbon networks: synthesis and applications in lithium-ion battery, sodium-ion battery and zinc-air battery

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• 作者：Lei Wang^a ; Chenglong Yang^b ; Shuo Dou^c ; Shuangyin Wang^c ; Jintao Zhang^d ; Xian Gao^a ; ^c ; Jianmin Ma^a ; ^{nanoelechem@hnu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yan Yu^b ; ^{yanyumse@ustc.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：N-doped hierarchically porous carbon networks ; oxygen reduction reaction ; lithium-ion battery ; sodium-ion battery ; zinc-air battery
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 November 2016
• 年：2016
• 卷：219
• 期：Complete
• 页码：592-603
• 全文大小：4509 K

文摘

Heteroatom-doped carbon nanomaterials with well-defined porous are used as anode materials for SIBs due to their exceptional structural characteristics. In this work, porous N-doped carbon networks composed with ultrathin carbon nanosheets were synthesized via the direct pyrolysis of Vitamin B5. The content of nitrogen, specific surface area, porous structure of the N-doped carbon nanosheet networks were adjusted by changing reaction temperatures. The formation mechasim of the ultrathin N-doped carbon nanosheet networks was also proposed. The generation of calcium carbonate/calcium oxide used as a self-template renders the formation of the porous structure via thermal treatment. The optimized samples possess a superior lithium and sodium storage: 1534 mAh g⁻¹ at 100 mA g⁻¹vs. Li/Li⁺ and 335 mAh g⁻¹ at 100 mA g⁻¹vs. Na/Na⁺, with nearly 100% cycling Coulombic efficiency, remarkable cycling retention and high rate capacity. Additionally, good electrocatalytic activity for ORR via a 4e⁻¹ pathway determines that the resulting primary Zn-air battery showed high discharge power energy density (80 mW cm⁻²), high reversibility and stability over continuous cycles.