Designing and preparing carbon anode materials modified with N and Fe-nanoparticle: Creating the interior electric field to improve their electrochemical performance

TY - JOUR

T1 - Designing and preparing carbon anode materials modified with N and Fe-nanoparticle

T2 - Creating the interior electric field to improve their electrochemical performance

AU - Li, Qiongguang

AU - Yuan, Menglei

AU - Wang, Yanhong

AU - Gao, Xingyue

AU - Li, Xiaowei

AU - Yao, Meng

AU - He, Hongyan

AU - Tan, Qiangqiang

AU - Zhong, Ziyi

AU - Su, Fabing

N1 - Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/7/1

Y1 - 2021/7/1

N2 - The increasing market demand calls for novel anode materials with low cost, high capacity, good rate performance, and high cycle stability. Here we report a facile method for preparing chitosan-derived and N-doped carbon composite (Fe-CDNC) decorated with Fe nanoparticles (NPs) as an efficient carbon anode material. The prepared Fe-CDNC composite could deliver a high reversible lithium capacity of 770 mAh g−1 at 100 mA g−1, much higher than that of both the bare CDNC (426 mAh g−1) and the theoretical capacity of commercial graphite (372 mAh g−1). The retention of lithium and sodium capacity was 95.5% after 10000 cycles and 98.7% after 5000 cycles at 2000 mA g−1, respectively, and thus the lithium and sodium capacity loss rates were 0.00045% and 0.00026% per cycle, respectively. Density functional theory calculations revealed that the strong coupling between the Fe NPs and the N-doped carbon layer via Fe-N bond formation contributed to constructing a built-in electric field, which boosted ions/charge diffusion dynamics, leading more lithium ions to be inserted/extracted to carbon layer during the lithiation/delithiation processes. Therefore, the Fe-CDNC composite performed an outstanding rate performance, cycle stability, and high reversible capacity. This work is promising to develop novel carbon anode materials for high-energy storage devices.

AB - The increasing market demand calls for novel anode materials with low cost, high capacity, good rate performance, and high cycle stability. Here we report a facile method for preparing chitosan-derived and N-doped carbon composite (Fe-CDNC) decorated with Fe nanoparticles (NPs) as an efficient carbon anode material. The prepared Fe-CDNC composite could deliver a high reversible lithium capacity of 770 mAh g−1 at 100 mA g−1, much higher than that of both the bare CDNC (426 mAh g−1) and the theoretical capacity of commercial graphite (372 mAh g−1). The retention of lithium and sodium capacity was 95.5% after 10000 cycles and 98.7% after 5000 cycles at 2000 mA g−1, respectively, and thus the lithium and sodium capacity loss rates were 0.00045% and 0.00026% per cycle, respectively. Density functional theory calculations revealed that the strong coupling between the Fe NPs and the N-doped carbon layer via Fe-N bond formation contributed to constructing a built-in electric field, which boosted ions/charge diffusion dynamics, leading more lithium ions to be inserted/extracted to carbon layer during the lithiation/delithiation processes. Therefore, the Fe-CDNC composite performed an outstanding rate performance, cycle stability, and high reversible capacity. This work is promising to develop novel carbon anode materials for high-energy storage devices.

KW - Anode materials

KW - Cycle stability

KW - Electric field

KW - Fast charge

KW - Hard carbon

UR - http://www.scopus.com/inward/record.url?scp=85107114065&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2021.138367

DO - 10.1016/j.electacta.2021.138367

M3 - 文章

AN - SCOPUS:85107114065

SN - 0013-4686

VL - 383

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 138367

ER -