利用高熵 NASICON 型固体电解质推动高能固态电池的发展

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-09-16 DOI:10.1021/acsaem.4c02011

Asish Kumar Das, Pratiksha Gami, Hari Narayanan Vasavan, Samriddhi Saxena, Neha Dagar, Sonia Deswal, Pradeep Kumar, Sunil Kumar

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引用次数: 0

摘要

在此，我们开发了一种高熵（∼1.52 R，在 M 位点计算）锂填充 NASICON 型固体电解质[Li1.3Sn1.7/3Zr1.7/3Ti1.7/3Al0.1Sc0.1Y0.1(PO4)3]，其总离子电导率（晶粒 + 晶界）为 ∼1.42 × 10-4 S cm-1（在含有 Zr-Sn-Ti 的 NASICON 中最高），活化能低至 ∼ 0.33 eV，相对密度为常规烧结颗粒的 ∼ 94%。带有 PVDF-HFP/LiTFSI 缓冲层的对称电池在 0.2 mA cm-2 的条件下循环 500 次后性能稳定，无短路现象。使用 LiFePO4 的全电池在 1C 条件下循环 100 次后容量保持在 99% 以上，而使用 NMC811 的电池在 C/3 条件下的容量为 140 mAh g-1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Advancing High-Energy Solid-State Batteries with High-Entropy NASICON-type Solid Electrolytes

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Advancing High-Energy Solid-State Batteries with High-Entropy NASICON-type Solid Electrolytes

Herein, we have developed a High-Entropy (∼1.52 R, calculated at M-site) lithium-stuffed NASICON-type solid electrolyte [Li_1.3Sn_1.7/3Zr_1.7/3Ti_1.7/3Al_0.1Sc_0.1Y_0.1(PO₄)₃] with a total (grain + grain-boundary) ionic conductivity of ∼1.42 × 10^–4 S cm^–1 (highest reported among NASICONs containing Zr–Sn–Ti) and a low activation energy of ∼0.33 eV with a relative density of Conventionally Sintered pellet ∼94%. Symmetric cells with a PVDF-HFP/LiTFSI buffer layer showed stable performance for 500 cycles at 0.2 mA cm^–2 without short-circuiting. Full cells with LiFePO₄ retained ∼99% capacity after 100 cycles at 1C, while those with NMC811 delivered ∼140 mAh g^–1 at C/3.

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.