TY - JOUR
T1 - All-Purpose Electrode Design of Flexible Conductive Scaffold toward High-Permanence Li–S Batteries
AU - He, Yusen
AU - Li, Mingjun
AU - Zhang, Yongguang
AU - Shan, Zhenzhen
AU - Zhao, Yan
AU - Li, Jingde
AU - Liu, Guihua
AU - Liang, Chunyong
AU - Bakenov, Zhumabay
AU - Li, Qiang
N1 - Funding Information:
Y.H. and M.L. contributed equally to this work. This work was supported by the Program for the Outstanding Young Talents of Hebei Province, China; Chunhui Project of Ministry of Education of the People's Republic of China (grant no. Z2017010). A typographical error in the title was corrected on May 11, 2020 after initial online publication.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - The main obstacles that hinder the development of efficient lithium sulfur (Li–S) batteries are the polysulfide shuttling effect in sulfur cathode and the uncontrollable growth of dendritic Li in the anode. An all-purpose flexible electrode that can be used both in sulfur cathode and Li metal anode is reported, and its application in wearable and portable storage electronic devices is demonstrated. The flexible electrode consists of a bimetallic CoNi nanoparticle-embedded porous conductive scaffold with multiple Co/Ni-N active sites (CoNi@PNCFs). Both experimental and theoretical analysis show that, when used as the cathode, the CoNi and Co/Ni-N active sites implanted on the porous CoNi@PNCFs significantly promote chemical immobilization toward soluble lithium polysulfides and their rapid conversion into insoluble Li2S, and therefore effectively mitigates the polysulfide shuttling effect. Additionally, a 3D matrix constructed with porous carbonous skeleton and multiple active centers successfully induces homogenous Li growth, realizing a dendrite-free Li metal anode. A Li–S battery assembled with S/CoNi@PNCFs cathode and Li/CoNi@PNCFs anode exhibits a high reversible specific capacity of 785 mAh g−1 and long cycle performance at 5 C (capacity fading rate of 0.016% over 1500 cycles).
AB - The main obstacles that hinder the development of efficient lithium sulfur (Li–S) batteries are the polysulfide shuttling effect in sulfur cathode and the uncontrollable growth of dendritic Li in the anode. An all-purpose flexible electrode that can be used both in sulfur cathode and Li metal anode is reported, and its application in wearable and portable storage electronic devices is demonstrated. The flexible electrode consists of a bimetallic CoNi nanoparticle-embedded porous conductive scaffold with multiple Co/Ni-N active sites (CoNi@PNCFs). Both experimental and theoretical analysis show that, when used as the cathode, the CoNi and Co/Ni-N active sites implanted on the porous CoNi@PNCFs significantly promote chemical immobilization toward soluble lithium polysulfides and their rapid conversion into insoluble Li2S, and therefore effectively mitigates the polysulfide shuttling effect. Additionally, a 3D matrix constructed with porous carbonous skeleton and multiple active centers successfully induces homogenous Li growth, realizing a dendrite-free Li metal anode. A Li–S battery assembled with S/CoNi@PNCFs cathode and Li/CoNi@PNCFs anode exhibits a high reversible specific capacity of 785 mAh g−1 and long cycle performance at 5 C (capacity fading rate of 0.016% over 1500 cycles).
KW - 3D matrices
KW - all-purpose electrodes
KW - electronic devices
KW - flexible conductive scaffolds
KW - polysulfide shuttling effect
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U2 - 10.1002/adfm.202000613
DO - 10.1002/adfm.202000613
M3 - Article
AN - SCOPUS:85082007193
VL - 30
JO - Advanced Materials for Optics and Electronics
JF - Advanced Materials for Optics and Electronics
SN - 1057-9257
IS - 19
M1 - 2000613
ER -