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

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL ACS Applied Energy Materials 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

引用次数: 0

Abstract

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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利用高熵 NASICON 型固体电解质推动高能固态电池的发展

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。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.

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