Achieving excellent energy storage properties in lead-free ceramics via competing FE/AFE phase coexistence

Zhongqian Lv; Bing Han; Zhen Liu; Shaobo Guo; Kai Dai; Fei Cao; Zhigao Hu; Genshui Wang

doi:10.1016/j.ensm.2025.104205

Achieving excellent energy storage properties in lead-free ceramics via competing FE/AFE phase coexistence

Zhongqian Lv
, Bing Han
, Zhen Liu^*
, Shaobo Guo
, Kai Dai
, Fei Cao
, Zhigao Hu
, Genshui Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Dielectric capacitors are widely utilized in large-scale power systems, including applications in medical and military fields. However, their relatively low energy storage density limits further advancements in miniaturization and integration. Therefore, improving the energy storage density of dielectric capacitors is of paramount importance. In this work, novel lead-free Na_0.70Sr_0.15Nb_0.75Ta_0.25O₃ (NSNT) ceramics were designed, which exhibit a unique combination of relaxor ferroelectric (FE) N phase and stabilized antiferroelectric (AFE) P phase, as confirmed through local structural analysis. The competing FE/AFE phase coexistence is attributed to the discrepancy in ion valence and radius. As a result, the NSNT ceramics demonstrate exceptional energy storage performance, featuring a recoverable energy density (W_rec) of 10.45 J/cm³ and an energy efficiency (η) of 83.0 % at 850 kV/cm, along with excellent stability. These outstanding energy storage properties not only confirm the promising application prospects of NN-based ceramics with competing FE/AFE phase coexistence, but also provide an innovative approach for advancing high-performance ceramic capacitors.

Original language	English
Article number	104205
Journal	Energy Storage Materials
Volume	77
DOIs	https://doi.org/10.1016/j.ensm.2025.104205
State	Published - Apr 2025
Externally published	Yes

Keywords

Energy storage
Lead-free
Phase coexistence
Sodium niobate

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ensm.2025.104205

Cite this

@article{202125a6e8e7499fbe12885c083975c5,

title = "Achieving excellent energy storage properties in lead-free ceramics via competing FE/AFE phase coexistence",

abstract = "Dielectric capacitors are widely utilized in large-scale power systems, including applications in medical and military fields. However, their relatively low energy storage density limits further advancements in miniaturization and integration. Therefore, improving the energy storage density of dielectric capacitors is of paramount importance. In this work, novel lead-free Na0.70Sr0.15Nb0.75Ta0.25O3 (NSNT) ceramics were designed, which exhibit a unique combination of relaxor ferroelectric (FE) N phase and stabilized antiferroelectric (AFE) P phase, as confirmed through local structural analysis. The competing FE/AFE phase coexistence is attributed to the discrepancy in ion valence and radius. As a result, the NSNT ceramics demonstrate exceptional energy storage performance, featuring a recoverable energy density (Wrec) of 10.45 J/cm³ and an energy efficiency (η) of 83.0 \% at 850 kV/cm, along with excellent stability. These outstanding energy storage properties not only confirm the promising application prospects of NN-based ceramics with competing FE/AFE phase coexistence, but also provide an innovative approach for advancing high-performance ceramic capacitors.",

keywords = "Energy storage, Lead-free, Phase coexistence, Sodium niobate",

author = "Zhongqian Lv and Bing Han and Zhen Liu and Shaobo Guo and Kai Dai and Fei Cao and Zhigao Hu and Genshui Wang",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2025",

month = apr,

doi = "10.1016/j.ensm.2025.104205",

language = "英语",

volume = "77",

journal = "Energy Storage Materials",

issn = "2405-8297",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Achieving excellent energy storage properties in lead-free ceramics via competing FE/AFE phase coexistence

AU - Lv, Zhongqian

AU - Han, Bing

AU - Liu, Zhen

AU - Guo, Shaobo

AU - Dai, Kai

AU - Cao, Fei

AU - Hu, Zhigao

AU - Wang, Genshui

PY - 2025/4

Y1 - 2025/4

N2 - Dielectric capacitors are widely utilized in large-scale power systems, including applications in medical and military fields. However, their relatively low energy storage density limits further advancements in miniaturization and integration. Therefore, improving the energy storage density of dielectric capacitors is of paramount importance. In this work, novel lead-free Na0.70Sr0.15Nb0.75Ta0.25O3 (NSNT) ceramics were designed, which exhibit a unique combination of relaxor ferroelectric (FE) N phase and stabilized antiferroelectric (AFE) P phase, as confirmed through local structural analysis. The competing FE/AFE phase coexistence is attributed to the discrepancy in ion valence and radius. As a result, the NSNT ceramics demonstrate exceptional energy storage performance, featuring a recoverable energy density (Wrec) of 10.45 J/cm³ and an energy efficiency (η) of 83.0 % at 850 kV/cm, along with excellent stability. These outstanding energy storage properties not only confirm the promising application prospects of NN-based ceramics with competing FE/AFE phase coexistence, but also provide an innovative approach for advancing high-performance ceramic capacitors.

AB - Dielectric capacitors are widely utilized in large-scale power systems, including applications in medical and military fields. However, their relatively low energy storage density limits further advancements in miniaturization and integration. Therefore, improving the energy storage density of dielectric capacitors is of paramount importance. In this work, novel lead-free Na0.70Sr0.15Nb0.75Ta0.25O3 (NSNT) ceramics were designed, which exhibit a unique combination of relaxor ferroelectric (FE) N phase and stabilized antiferroelectric (AFE) P phase, as confirmed through local structural analysis. The competing FE/AFE phase coexistence is attributed to the discrepancy in ion valence and radius. As a result, the NSNT ceramics demonstrate exceptional energy storage performance, featuring a recoverable energy density (Wrec) of 10.45 J/cm³ and an energy efficiency (η) of 83.0 % at 850 kV/cm, along with excellent stability. These outstanding energy storage properties not only confirm the promising application prospects of NN-based ceramics with competing FE/AFE phase coexistence, but also provide an innovative approach for advancing high-performance ceramic capacitors.

KW - Energy storage

KW - Lead-free

KW - Phase coexistence

KW - Sodium niobate

UR - https://www.scopus.com/pages/publications/105001112057

U2 - 10.1016/j.ensm.2025.104205

DO - 10.1016/j.ensm.2025.104205

M3 - 文章

AN - SCOPUS:105001112057

SN - 2405-8297

VL - 77

JO - Energy Storage Materials

JF - Energy Storage Materials

M1 - 104205

ER -

Achieving excellent energy storage properties in lead-free ceramics via competing FE/AFE phase coexistence

Abstract

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this