Nitrogen-doped hierarchically porous carbon networks: synthesis and applications in lithium-ion battery, sodium-ion battery and zinc-air battery
Nitrogen-doped hierarchically porous carbon networks: synthesis and applications in lithium-ion battery, sodium-ion battery and zinc-air battery
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DOI：
10.1016/j.electacta.2016.10.050
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发表时间：
2016-11
影响因子：
6.6
通讯作者：
Lei Wang;Cheng-Long Yang;Shuo Dou;Shuangyin Wang;Jintao Zhang;Xian N. Gao;Jianmin Ma;Yan Yu
中科院分区：
文献类型：
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作者：
Lei Wang;Cheng-Long Yang;Shuo Dou;Shuangyin Wang;Jintao Zhang;Xian N. Gao;Jianmin Ma;Yan Yu
杂原子掺杂的碳纳米材料由于其特殊的结构特性而被用作SIB的阳极材料。本论文以维生素B5为原料，通过直接热分解法制备了由纳米碳片构成的多孔氮掺杂碳网络。通过改变反应温度，调节氮掺杂碳纳米片网络的氮含量、比表面积、孔结构。提出了碳纳米片网络的形成机理。用作自模板的碳酸钙/氧化钙的生成使得经由热处理形成多孔结构。优化后的样品具有上级的锂和钠存储性能：100 mA g−1vs.Li/Li+时为1534 mAh g −1vs.Na/Na+时为335 mAh g−1vs.Na/Na+，循环库仑效率接近100%，循环保持率显著，高倍率容量。此外，通过4 e − 1途径对ORR的良好电催化活性决定了所得的一次锌空气电池在连续循环中显示出高放电功率能量密度（80 mW cm−2）、高可逆性和稳定性。
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−1at 100 mA g−1vs.Li/Li+and 335 mAh g−1at 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−1pathway 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.