Insights into the Na+ Storage Mechanism of Phosphorus-Functionalized Hard Carbon as Ultrahigh Capacity Anodes

Li, Yu; Yuan, Yifei; Bai, Ying; Liu, Yuanchang; Wang, Zhaohua; Li, Limin; Wu, Feng; Amine, Khalil; Wu, Chuan; Lu, Jun

doi:10.1002/aenm.201702781

Title: Insights into the Na⁺ Storage Mechanism of Phosphorus-Functionalized Hard Carbon as Ultrahigh Capacity Anodes

Journal Article · Tue Mar 06 00:00:00 EST 2018 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.201702781· OSTI ID:1466401

Li, Yu ^[1]; Yuan, Yifei ^[2]; Bai, Ying ^[1]; Liu, Yuanchang ^[1]; Wang, Zhaohua ^[1]; Li, Limin ^[1]; Wu, Feng ^[3]; Amine, Khalil ^[2]; Wu, Chuan ^[3];

^[2]

Beijing Institute of Technology, Beijing (People's Republic of China)
Argonne National Lab. (ANL), Lemont, IL (United States)
Beijing Institute of Technology, Beijing (People's Republic of China); Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing (People's Republic of China)

Abstract Hard carbon as a typical anode material for sodium ion batteries has received much attention in terms of its low cost and renewability. Herein, phosphorus‐functionalized hard carbon with a specific “honeycomb briquette” shaped morphology is synthesized via electrospinning technology. When applied as an anode material for Na ⁺ storage, it exhibits an impressively high reversible capacity of 393.4 mA h g ⁻¹ with the capacity retention up to 98.2% after 100 cycles. According to first‐principle calculation, the ultrahigh capacity of the as‐prepared anode is ascribed to the enhancement of Na‐absorption through formation of PO and PC bonds in graphitic layers when doped with phosphorus. Moreover, the increase of electron density around the Fermi level is found to be mainly caused by O atoms instead of P atoms.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Basic Research Program of China; USDOE

Grant/Contract Number:: AC02-06CH11357; DE‐AC02‐06CH11357

OSTI ID:: 1466401

Alternate ID(s):: OSTI ID: 1423911

Journal Information:: Advanced Energy Materials, Vol. 8, Issue 18; ISSN 1614-6832

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 174 works

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Title: Insights into the Na+ Storage Mechanism of Phosphorus-Functionalized Hard Carbon as Ultrahigh Capacity Anodes

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