DataVXACS Energy LettersPaper
journal article·2024-04-12

Consolidating the Vulnerable Interphase of Ni-Rich Layered Cathode by Multifunctional Water-Based Binder

Qingmeng Gan, Ning Qin, Hao Guo, Fangchang Zhang, Huimin Yuan, Wen Luo, Zhiqiang Li, Yingzhi Li, Li Lu, Zhenghe Xu, Liguang Wang, Jun Lu, Zhouguang Lu

ACS Energy Letters· Volume 9· Issue 4
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Source abstract

Abstract

Ni-rich layered oxides hold significant promise as cathodes for lithium-ion batteries. Nevertheless, the susceptibility of their interphase at deep state-of-charge (SoC) imposes substantial limitations on their practical viability. Herein, we propose a water-based composite binder of dextran sulfate sodium- co -poly(acrylic acid) lithium (DSS- co -PAA(Li)) to address this dilemma. Capitalizing on the robust coordination bond interaction between the sulfate acid groups of DSS chains and transition-metal (TM) ion on the surface lattice, this functionally designed binder not only augments the cohesiveness within the electrode architecture but also effectively suppresses the vigorous reaction involving the highly labile Ni 4+ and lattice O at the interphase. This attenuation is achieved by mitigating the undesirable phase transition and widening the energy gap between the Ni 3d and O 2p band of NCM 811 . Consequently, the NCM 811 cathode with DSS- co -PAA(Li) binder yields an enhanced initial Coulombic efficiency (ICE) of 93.3% and capacity retention of nearly 90% after 200 cycles.
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Research context

Energy storageComposites

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials, Southern University of Science and Technology, Shenzhen 518055, China

Department of Mechanical Engineering, National University of Singapore, 117575, Singapore

College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China

State Key Laboratory of Advanced Chemical Power Sources, Zunyi, Guizhou 563003, China

Funding

University Grants Commission · Basic and Applied Basic Research Foundation of Guangdong Province · Natural Science Foundation of Shenzhen Municipality · Shenzhen Science and Technology Innovation Commission · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials · the Guizhou Provincial Foundation for Excellent Scholars Program · Innovation Zone program of China

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