Sodium Phytate Cross-Linked Polyacrylic Acid as Multifunctional Aqueous Binder Stabilizes LiNi_{0.8}Co_{0.1}Mn_{0.1}O₂ to 4.6 V

Hongzhi Wang; Fangchang Zhang; Ning Qin; Zhenyu Wang; Yanfang Wang; Zhan Wang; Chun Zeng; Huiqiao Li; Quanbing Liu; Yingzhi Li; Zhouguang Lu; Dawei Luo; Hua Cheng

doi:10.1021/acsenergylett.4c02796

journal article·2025-01-10

Sodium Phytate Cross-Linked Polyacrylic Acid as Multifunctional Aqueous Binder Stabilizes LiNi_0.8Co_0.1Mn_0.1O₂ to 4.6 V

Hongzhi Wang, Fangchang Zhang, Ning Qin, Zhenyu Wang, Yanfang Wang, Zhan Wang, Chun Zeng, Huiqiao Li, Quanbing Liu, Yingzhi Li, Zhouguang Lu, Dawei Luo, Hua Cheng

ACS Energy Letters· Volume 10· Issue 1

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Source abstract

Abstract

Nickel-rich layered oxides are promising candidates for next-generation lithium-ion batteries. However, nickel-rich cathodes largely suffer from poor cyclability due to interfacial instability and intergranular cracking, particularly under high voltages and elevated temperatures. Herein, a multifunctional binder (PAA–PN) derived from the cross-linking of sodium phytate (PN) and poly(acrylic acid) (PAA) was designed to stabilize the LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) working under a cutoff voltage of 4.6 V. The PAA–PN promotes the formation of dual protective layers, consisting of an outer stable cathode electrolyte interface and an inner thin rock-salt phase on the NCM811 surface, effectively mitigating electrolyte decomposition, transition-metal dissolution, and phase-fatigue issues. Additionally, the robust elastic PAA–PN cross-linking network and chelation of PAA–PN with the NCM811 surface effectively inhibit intergranular cracking. Benefiting from these multifunctional advantages, NCM811 cathodes with PAA–PN binder achieve capacity retention of 95.1% (25 °C) and 84.7% (45 °C) after 100 cycles at 4.6 V, respectively.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Extraction and Separation Processes

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

Affiliations

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

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China

School of Materials Science and Environmental Engineering, Shenzhen Polytechnic University, Shenzhen 518055, China

School of Undergraduate Education, Shenzhen Polytechnic University, Shenzhen 518055, China

Funding

Science and Technology Foundation of Shenzhen City · Basic and Applied Basic Research Foundation of Guangdong Province · Science, Technology and Innovation Commission of Shenzhen Municipality · Department of Education of Guangdong Province · National Natural Science Foundation of China · Jiangyin-SUSTech Innovation Fund · Innovation Team Project of Guangdong · Guangdong-Hong Kong-Macau Joint Innovation Fund

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