Metal-Free Polymer-Based Current Collector for High Energy Density Lithium-Metal Batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F24%3A00598604" target="_blank" >RIV/61389005:_____/24:00598604 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/smll.202404437" target="_blank" >https://doi.org/10.1002/smll.202404437</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/smll.202404437" target="_blank" >10.1002/smll.202404437</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Metal-Free Polymer-Based Current Collector for High Energy Density Lithium-Metal Batteries

Popis výsledku v původním jazyce

The energy density of lithium-metal batteries (LMBs) relies substantially on the thickness of the lithium-metal anode. However, a bare, thin lithium foil electrode is vulnerable to fragmentation due to the inhomogeneity of the lithium stripping/plating process, disrupting the electron conduction pathway along the electrode. Accordingly, the current collector is an integral part to prevent the resulting loss of electronic conductivity. However, the common use of a heavy and lithiophobic Cu current collector results in a great anode mass increase and unsatisfactory lithium plating behavior, limiting both the achievable specific energy and the cycle life of LMBs. Herein, a metal-free polymer-based current collector is reported that allows for a substantial mass reduction, while simultaneously extending the cycle life of the lithium-metal anode. The specific mass of the ultra-light, 10 mu m thick polymer-based current collector is only 1.03 mg cm(-2), which is approximate to 11% of a 10 mu m thick copper foil (8.96 mg cm(-2)). As a result, LMB cells employing this novel current collector provide a specific energy of 448 Wh kg(-1), which is almost 18% higher than that of LMBs using the copper current collector (378 Wh kg(-1)), and a greatly enhanced cycle life owing to a more homogeneous lithium deposition.

Název v anglickém jazyce

Metal-Free Polymer-Based Current Collector for High Energy Density Lithium-Metal Batteries

Popis výsledku anglicky

The energy density of lithium-metal batteries (LMBs) relies substantially on the thickness of the lithium-metal anode. However, a bare, thin lithium foil electrode is vulnerable to fragmentation due to the inhomogeneity of the lithium stripping/plating process, disrupting the electron conduction pathway along the electrode. Accordingly, the current collector is an integral part to prevent the resulting loss of electronic conductivity. However, the common use of a heavy and lithiophobic Cu current collector results in a great anode mass increase and unsatisfactory lithium plating behavior, limiting both the achievable specific energy and the cycle life of LMBs. Herein, a metal-free polymer-based current collector is reported that allows for a substantial mass reduction, while simultaneously extending the cycle life of the lithium-metal anode. The specific mass of the ultra-light, 10 mu m thick polymer-based current collector is only 1.03 mg cm(-2), which is approximate to 11% of a 10 mu m thick copper foil (8.96 mg cm(-2)). As a result, LMB cells employing this novel current collector provide a specific energy of 448 Wh kg(-1), which is almost 18% higher than that of LMBs using the copper current collector (378 Wh kg(-1)), and a greatly enhanced cycle life owing to a more homogeneous lithium deposition.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Small

ISSN

1613-6810

e-ISSN

1613-6829

Svazek periodika

20

Číslo periodika v rámci svazku

48

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

2404437

Kód UT WoS článku

001311543500001

EID výsledku v databázi Scopus

2-s2.0-85203635496