daohang fenxiangbox searchbox qikanlogonew daohangnew searchboxnew navrightzone footerzone paper
中
Home > Journals > ACS Energy Letters
‹ Previous Article Next Article ›

Pyridinic-N-Dominated Doped Defective Graphene as a Superior Oxygen Electrocatalyst for Ultrahigh-Energy-Density Zn–Air Batteries AITranslate

Qichen Wang; Yujin Ji; Yongpeng Lei; Yaobing Wang; Yingde Wang; Youyong Li; Shuangyin Wang;
Central South University of Forestry and Technology; Soochow University; National University of Defense Technology; Fujian Institute of Research on the Structure of Matter; National University of Defense Technology; Soochow University; Hunan University
AITranslate
Publisher: ACS
Share Citation Information Add to Favorites

    Scan to share on WeChat or Moments

Use WeChat scan.
Share with WeChat friends or Moments

Abstract AITranslate

Identification of catalytic sites for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in carbon materials remains a great challenge. Here, we construct a pyridinic-N-dominated doped graphene with abundant vacancy defects. The optimized sample with an ultrahigh pore volume (3.43 cm3 g–1) exhibits unprecedented ORR activity with a half-wave potential of 0.85 V in alkaline. For the first time, density functional theory results indicate that the quadri-pyridinic N-doped carbon site synergized with a vacancy defect is the active site, which presents the lowest overpotential of 0.28 V for ORR and 0.28 V for OER. The primary Zn–air batteries display a maximum power density of 115.2 mW cm–2 and an energy density as high as 872.3 Wh kg–1. The rechargeable Zn–air batteries illustrate a low discharge–charge overpotential and high stability (>78 h). This work provides new insight into the correlation between the N configuration synergized with a vacancy defect in electrocatalysis.

KeyWords AITranslate

No data

Basic Information:

DOI：https://doi.org/10.1021/acsenergylett.8b00303

Chinese Library Classification Number:

Citation Information:

Identification of catalytic sites for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in carbon materials remains a great challenge. Here, we construct a pyridinic-N-dominated doped graphene with abundant vacancy defects. The optimized sample with an ultrahigh pore volume (3.43 cm3 g–1) exhibits unprecedented ORR activity with a half-wave potential of 0.85 V in alkaline. For the first time, density functional theory results indicate that the quadri-pyridinic N-doped carbon site synergized with a vacancy defect is the active site, which presents the lowest overpotential of 0.28 V for ORR and 0.28 V for OER. The primary Zn–air batteries display a maximum power density of 115.2 mW cm–2 and an energy density as high as 872.3 Wh kg–1. The rechargeable Zn–air batteries illustrate a low discharge–charge overpotential and high stability (>78 h). This work provides new insight into the correlation between the N configuration synergized with a vacancy defect in electrocatalysis.

quote

GB/T 7714-2015 [1] Qichen Wang, Yujin Ji, Yongpeng Lei, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.8b00303.
MLA [1] Qichen Wang, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.8b00303.
APA [1] Qichen Wang, Yujin Ji, Yongpeng Lei, Yaobing Wang, Yingde Wang, Youyong Li, & Shuangyin Wang. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.8b00303
IEEE [1] Qichen Wang, Yujin Ji, Yongpeng Lei, Yaobing Wang, Yingde Wang, Youyong Li, and Shuangyin Wang, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.8b00303.