All-Electrochem-Active Graphite Electrode Enabled by Manipulating Li+ Activity of Inactive Components for High-Energy Batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F25%3A10258333" target="_blank" >RIV/61989100:27640/25:10258333 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsaem.5c00794" target="_blank" >https://pubs.acs.org/doi/10.1021/acsaem.5c00794</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsaem.5c00794" target="_blank" >10.1021/acsaem.5c00794</a>

Jazyk výsledku

angličtina

Název v původním jazyce

All-Electrochem-Active Graphite Electrode Enabled by Manipulating Li+ Activity of Inactive Components for High-Energy Batteries

Popis výsledku v původním jazyce

Graphite anodes have approached their theoretical specific capacity of 372 mA h g–1, which becomes an obstacle for further increasing the energy density of commercial lithium-ion batteries. Various strategies have been proposed to enhance the energy density of graphite-based full batteries, such as decreasing the usage of inactive binders and conductive additives and exploring graphite/SiOx composite anodes. Nevertheless, the anodes cannot balance energy density, power density, and cycling stability. In this study, we designed an all-electrochem-active graphite electrode by manipulating the Li+ activity of the inactive components to improve the energy density of the entire electrode. In our study, colloidal two-dimensional titanium carbide nanosheets (MXene) were employed as binders, and carbon-coated titanium dioxide nanoparticles with oxygen defects (TiO2–x@C) acted as conductive additives in the electrode configurations. Both MXene and TiO2–x@C can function as active materials to store lithium ions by reversible insertion and extraction with little electrochemical degradation. As a result, the all-electrochem-active graphite electrodes demonstrated a superior specific capacity of 394 mA h g–1 at a current density of 0.2C after 300 cycles. This concept of all-electrochem-active electrodes is anticipated to inspire future research on high-energy-density batteries by activating the Li+ affinities of binders and conductive additives.

Název v anglickém jazyce

All-Electrochem-Active Graphite Electrode Enabled by Manipulating Li+ Activity of Inactive Components for High-Energy Batteries

Popis výsledku anglicky

Graphite anodes have approached their theoretical specific capacity of 372 mA h g–1, which becomes an obstacle for further increasing the energy density of commercial lithium-ion batteries. Various strategies have been proposed to enhance the energy density of graphite-based full batteries, such as decreasing the usage of inactive binders and conductive additives and exploring graphite/SiOx composite anodes. Nevertheless, the anodes cannot balance energy density, power density, and cycling stability. In this study, we designed an all-electrochem-active graphite electrode by manipulating the Li+ activity of the inactive components to improve the energy density of the entire electrode. In our study, colloidal two-dimensional titanium carbide nanosheets (MXene) were employed as binders, and carbon-coated titanium dioxide nanoparticles with oxygen defects (TiO2–x@C) acted as conductive additives in the electrode configurations. Both MXene and TiO2–x@C can function as active materials to store lithium ions by reversible insertion and extraction with little electrochemical degradation. As a result, the all-electrochem-active graphite electrodes demonstrated a superior specific capacity of 394 mA h g–1 at a current density of 0.2C after 300 cycles. This concept of all-electrochem-active electrodes is anticipated to inspire future research on high-energy-density batteries by activating the Li+ affinities of binders and conductive additives.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21000 - Nano-technology

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ACS Applied Energy Materials

ISSN

2574-0962

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

8277-8287

Kód UT WoS článku

001506459000001

EID výsledku v databázi Scopus

2-s2.0-105007880815