Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries

Qinglu Fan; Shaodian Yang; Jun Liu; Haodong Liu; Kaiji Lin; Rui Liu; Chaoyu Hong; Liying Liu; Yan Chen; Ke An; Ping Liu; Zhicong Shi; Yong Yang

doi:10.1016/j.jpowsour.2019.03.014

Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries

Qinglu Fan, Shaodian Yang, Jun Liu, Haodong Liu, Kaiji Lin, Rui Liu, Chaoyu Hong, Liying Liu, Yan Chen, Ke An, Ping Liu, Zhicong Shi, Yong Yang

Materials Engineering

Research output: Contribution to journal › Article › peer-review

115 Scopus citations

Abstract

In this work, a unique artificial interface combing characteristics of both high ionic and electronic conductivities has been successfully constructed at the surface of Ni-rich LiNi₀_·₈Co₀_·₁Mn₀_·₁O₂ (NCM811). The ionic conductor layer is fabricated through reacting H₃PO₄ with the lithium residuals on the surface of NCM811 to form Li₃PO₄. The interface with high electronic conductivity is constructed by attaching graphene fragments to the NCM811 spherical particles. Due to the synergistic effect of the Li₃PO₄ coating layer and the graphene network, the modified sample (GN-LPO-NCM811) exhibits high capacity retention of 94.3% after 150 cycles at 0.5C between 3.0 and 4.3 V, while the pristine material shows a much lower retention of only 88.1%. In addition, the GN-LPO-NCM811 also presents improved cycling stability at elevated temperature of 55 °C. Even at an extremely high rate of 10C, the GN-LPO-NCM811 still remains 70% of its original capacity, while the pristine NCM811 only delivers 50% of the capacity. The stable cycling performance of GN-LPO-NCM811 is demonstrated in a full cell with graphite anode at ambient temperatures. Importantly, the thermal stability of the modified samples is also greatly enhanced. This study provides an effective method to improve the electrochemical performance of LiNi₀_·₈Co₀_·₁Mn₀_·₁O₂.

Original language	English
Pages (from-to)	91-99
Number of pages	9
Journal	Journal of Power Sources
Volume	421
DOIs	https://doi.org/10.1016/j.jpowsour.2019.03.014
State	Published - May 1 2019

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). This work was supported by the National Natural Science Foundation, China (Nos. 21673051 and 51604086), the Department of Science and Technology of Guangdong Province, China (No. 2017B010119003), the “One-hundred Talents plan” (No. 220418056), and the Youth Foundation of Guangdong University of Technology, China (No. 252151038). Neutron diffraction work was carried out at the Spallation Neutron Source (SNS), which is the U.S. Department of Energy (DOE) user facility at the Oak Ridge National Laboratory, sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences. The authors thank Mr. M. J. Frost at SNS for the technique support.

Keywords

Graphene
LiNiCoMnO
LiPO
Mixed-conducting interlayer
Synergistic effect

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2019.03.014

Cite this

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title = "Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries",

abstract = "In this work, a unique artificial interface combing characteristics of both high ionic and electronic conductivities has been successfully constructed at the surface of Ni-rich LiNi0·8Co0·1Mn0·1O2 (NCM811). The ionic conductor layer is fabricated through reacting H3PO4 with the lithium residuals on the surface of NCM811 to form Li3PO4. The interface with high electronic conductivity is constructed by attaching graphene fragments to the NCM811 spherical particles. Due to the synergistic effect of the Li3PO4 coating layer and the graphene network, the modified sample (GN-LPO-NCM811) exhibits high capacity retention of 94.3% after 150 cycles at 0.5C between 3.0 and 4.3 V, while the pristine material shows a much lower retention of only 88.1%. In addition, the GN-LPO-NCM811 also presents improved cycling stability at elevated temperature of 55 °C. Even at an extremely high rate of 10C, the GN-LPO-NCM811 still remains 70% of its original capacity, while the pristine NCM811 only delivers 50% of the capacity. The stable cycling performance of GN-LPO-NCM811 is demonstrated in a full cell with graphite anode at ambient temperatures. Importantly, the thermal stability of the modified samples is also greatly enhanced. This study provides an effective method to improve the electrochemical performance of LiNi0·8Co0·1Mn0·1O2.",

keywords = "Graphene, LiNiCoMnO, LiPO, Mixed-conducting interlayer, Synergistic effect",

author = "Qinglu Fan and Shaodian Yang and Jun Liu and Haodong Liu and Kaiji Lin and Rui Liu and Chaoyu Hong and Liying Liu and Yan Chen and Ke An and Ping Liu and Zhicong Shi and Yong Yang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

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T1 - Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries

AU - Fan, Qinglu

AU - Yang, Shaodian

AU - Liu, Jun

AU - Liu, Haodong

AU - Lin, Kaiji

AU - Liu, Rui

AU - Hong, Chaoyu

AU - Liu, Liying

AU - Chen, Yan

AU - An, Ke

AU - Liu, Ping

AU - Shi, Zhicong

AU - Yang, Yong

PY - 2019/5/1

Y1 - 2019/5/1

N2 - In this work, a unique artificial interface combing characteristics of both high ionic and electronic conductivities has been successfully constructed at the surface of Ni-rich LiNi0·8Co0·1Mn0·1O2 (NCM811). The ionic conductor layer is fabricated through reacting H3PO4 with the lithium residuals on the surface of NCM811 to form Li3PO4. The interface with high electronic conductivity is constructed by attaching graphene fragments to the NCM811 spherical particles. Due to the synergistic effect of the Li3PO4 coating layer and the graphene network, the modified sample (GN-LPO-NCM811) exhibits high capacity retention of 94.3% after 150 cycles at 0.5C between 3.0 and 4.3 V, while the pristine material shows a much lower retention of only 88.1%. In addition, the GN-LPO-NCM811 also presents improved cycling stability at elevated temperature of 55 °C. Even at an extremely high rate of 10C, the GN-LPO-NCM811 still remains 70% of its original capacity, while the pristine NCM811 only delivers 50% of the capacity. The stable cycling performance of GN-LPO-NCM811 is demonstrated in a full cell with graphite anode at ambient temperatures. Importantly, the thermal stability of the modified samples is also greatly enhanced. This study provides an effective method to improve the electrochemical performance of LiNi0·8Co0·1Mn0·1O2.

AB - In this work, a unique artificial interface combing characteristics of both high ionic and electronic conductivities has been successfully constructed at the surface of Ni-rich LiNi0·8Co0·1Mn0·1O2 (NCM811). The ionic conductor layer is fabricated through reacting H3PO4 with the lithium residuals on the surface of NCM811 to form Li3PO4. The interface with high electronic conductivity is constructed by attaching graphene fragments to the NCM811 spherical particles. Due to the synergistic effect of the Li3PO4 coating layer and the graphene network, the modified sample (GN-LPO-NCM811) exhibits high capacity retention of 94.3% after 150 cycles at 0.5C between 3.0 and 4.3 V, while the pristine material shows a much lower retention of only 88.1%. In addition, the GN-LPO-NCM811 also presents improved cycling stability at elevated temperature of 55 °C. Even at an extremely high rate of 10C, the GN-LPO-NCM811 still remains 70% of its original capacity, while the pristine NCM811 only delivers 50% of the capacity. The stable cycling performance of GN-LPO-NCM811 is demonstrated in a full cell with graphite anode at ambient temperatures. Importantly, the thermal stability of the modified samples is also greatly enhanced. This study provides an effective method to improve the electrochemical performance of LiNi0·8Co0·1Mn0·1O2.

KW - Graphene

KW - LiNiCoMnO

KW - LiPO

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KW - Synergistic effect

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VL - 421

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JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Mixed-conducting interlayer boosting the electrochemical performance of Ni-rich layered oxide cathode materials for lithium ion batteries

Abstract

Funding

Keywords

UN SDGs

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