Details
| Original language | English |
|---|---|
| Article number | 2004770 |
| Journal | Small |
| Volume | 16 |
| Issue number | 44 |
| Early online date | 8 Oct 2020 |
| Publication status | Published - 5 Nov 2020 |
Abstract
To unlock the great potential of lithium metal anodes for high-performance batteries, a number of critical challenges must be addressed. The uncontrolled dendrite growth and volume changes during cycling (especially, at high rates) will lead to short lifespan, low Coulombic efficiency (CE), and security risks of the batteries. Here it is reported that Li metal anodes, employing the monodisperse, lithiophilic, robust, and large-cavity N-doped hollow carbon nanospheres (NHCNSs) as the host, show remarkable performances—high areal capacity (10 mAh cm −2), high CE (up to 99.25% over 500 cycles), complete suppression of dendrite growth, dense packing of Li anode, and an extremely smooth electrode surface during repeated Li plating/stripping. In symmetric cells, a highly stable voltage hysteresis over a long cycling life >1200 h is achieved, and a low and stable voltage hysteresis can be realized even at an ultrahigh current density of 64 mA cm −2. Furthermore, the NHCNSs-based anodes, when paired with a LiFePO 4 (LFP) cathode in full cells, give rise to highly improved rate capability (104 mAh g −1 at 10 C) and cycling stability (91.4% capacity retention for 200 cycles), enabling a promising candidate for the next-generation high energy/power density batteries.
Keywords
- N-doped hollow carbon nanospheres, dendrite-free surface, dense Li anode, high capacity, lithium metal anodes, ultrahigh rate
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biotechnology
- Materials Science(all)
- Biomaterials
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
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In: Small, Vol. 16, No. 44, 2004770, 05.11.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High‐Capacity, Dendrite‐Free, and Ultrahigh‐Rate Lithium‐Metal Anodes Based on Monodisperse N‐Doped Hollow Carbon Nanospheres
AU - Liu, Yuping
AU - Zhen, Yanzhong
AU - Li, Taoran
AU - Bettels, Frederik
AU - He, Tao
AU - Peng, Manhua
AU - Liang, Yucang
AU - Ding, Fei
AU - Zhang, Lin
N1 - Funding Information: Y.L. and Y.Z. contributed equally to this work. Y.L. is grateful to Prof. Dr. Reiner Anwander for normal financial support for this research. Y.Z. acknowledges financial support from the China Scholarship Council (CSC).
PY - 2020/11/5
Y1 - 2020/11/5
N2 - To unlock the great potential of lithium metal anodes for high-performance batteries, a number of critical challenges must be addressed. The uncontrolled dendrite growth and volume changes during cycling (especially, at high rates) will lead to short lifespan, low Coulombic efficiency (CE), and security risks of the batteries. Here it is reported that Li metal anodes, employing the monodisperse, lithiophilic, robust, and large-cavity N-doped hollow carbon nanospheres (NHCNSs) as the host, show remarkable performances—high areal capacity (10 mAh cm −2), high CE (up to 99.25% over 500 cycles), complete suppression of dendrite growth, dense packing of Li anode, and an extremely smooth electrode surface during repeated Li plating/stripping. In symmetric cells, a highly stable voltage hysteresis over a long cycling life >1200 h is achieved, and a low and stable voltage hysteresis can be realized even at an ultrahigh current density of 64 mA cm −2. Furthermore, the NHCNSs-based anodes, when paired with a LiFePO 4 (LFP) cathode in full cells, give rise to highly improved rate capability (104 mAh g −1 at 10 C) and cycling stability (91.4% capacity retention for 200 cycles), enabling a promising candidate for the next-generation high energy/power density batteries.
AB - To unlock the great potential of lithium metal anodes for high-performance batteries, a number of critical challenges must be addressed. The uncontrolled dendrite growth and volume changes during cycling (especially, at high rates) will lead to short lifespan, low Coulombic efficiency (CE), and security risks of the batteries. Here it is reported that Li metal anodes, employing the monodisperse, lithiophilic, robust, and large-cavity N-doped hollow carbon nanospheres (NHCNSs) as the host, show remarkable performances—high areal capacity (10 mAh cm −2), high CE (up to 99.25% over 500 cycles), complete suppression of dendrite growth, dense packing of Li anode, and an extremely smooth electrode surface during repeated Li plating/stripping. In symmetric cells, a highly stable voltage hysteresis over a long cycling life >1200 h is achieved, and a low and stable voltage hysteresis can be realized even at an ultrahigh current density of 64 mA cm −2. Furthermore, the NHCNSs-based anodes, when paired with a LiFePO 4 (LFP) cathode in full cells, give rise to highly improved rate capability (104 mAh g −1 at 10 C) and cycling stability (91.4% capacity retention for 200 cycles), enabling a promising candidate for the next-generation high energy/power density batteries.
KW - N-doped hollow carbon nanospheres
KW - dendrite-free surface
KW - dense Li anode
KW - high capacity
KW - lithium metal anodes
KW - ultrahigh rate
UR - http://www.scopus.com/inward/record.url?scp=85092160961&partnerID=8YFLogxK
U2 - 10.1002/smll.202004770
DO - 10.1002/smll.202004770
M3 - Article
VL - 16
JO - Small
JF - Small
SN - 1613-6810
IS - 44
M1 - 2004770
ER -