A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessiontitpmih6ovki2tu9gj6c7et9hl5pq6h0): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed!

Filename: helpers/my_audit_helper.php

Line Number: 143

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Attempt to read property "Count" on bool

Filename: helpers/my_audit_helper.php

Line Number: 3100

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

Unleashed Remarkable Energy Storage Performance in BiKTiO-based Relaxor Ferroelectrics by Local Structural Fluctuation. | LitMetric

AI Article Synopsis

  • Dielectric capacitors can store energy quickly and have high power, but achieving both high energy density and efficiency is difficult, especially over varying conditions.
  • This study introduces a method using NaTaO in ferroelectric relaxor materials to enhance local structural fluctuations, leading to better energy-storage capabilities.
  • The resulting ceramic demonstrates excellent performance with an energy density of 15.0 J/cm, efficiency up to 80%, and stability across a wide frequency range (10-200 Hz) while also enduring extensive cycling.

Article Abstract

Dielectric capacitors harvest energy through an electrostatic storage process, which enables an ultrafast charging-discharging rate and ultrahigh power density. However, achieving high energy density (W) and efficiency (η) simultaneously, especially when preserving them across a wide frequency/temperature range or cycling numbers, remains challenging. In this work, by especially introducing NaTaO into the representative ferroelectric relaxor of BiKTiO-BiNaTiO and leveraging the mismatch between B-site atoms, we proposed a method of enhancing local structural fluctuation to refine the polar configuration and to effectively improve its overall energy-storage performances. As a consequence, the ceramic exhibits an ultrahigh W of 15.0 J/cm and high η up to 80 %, along with a very wide frequency stability of 10-200 Hz and extensive cycling number up to 10. In-depth local structure and chemical environment investigations, consisting of atom-scale electron microscopy, neutron total scattering, and solid-state nuclear magnetic resonance, reveal that the randomly distributed A/B-site atom pairs emerge in the system, leading to the evident local structural fluctuations and concomitant polymorphic polar nanodomains. These key ingredients contribute to the large polarization, minimal hysteresis, and high breakdown strength, thereby promoting energy-storage performances. This work opens a new path for designing high-performance dielectric capacitors via manipulating local structural fluctuations.

Download full-text PDF

Source
http://dx.doi.org/10.1002/anie.202416291DOI Listing

Publication Analysis

Top Keywords

local structural
16
structural fluctuation
8
dielectric capacitors
8
energy-storage performances
8
structural fluctuations
8
local
5
unleashed remarkable
4
remarkable energy
4
energy storage
4
storage performance
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!