Sodium Phytate Cross-Linked Polyacrylic Acid as Multifunctional Aqueous Binder Stabilizes LiNi0.8Co0.1Mn0.1O2 to 4.6 V

IF 19.3 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
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
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引用次数: 0

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 LiNi0.8Co0.1Mn0.1O2 (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.

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来源期刊
ACS Energy Letters
ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment
CiteScore
31.20
自引率
5.00%
发文量
469
审稿时长
1 months
期刊介绍: ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.
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