Abhirup Bhadra, Maxime Brunisholz, Jacob Otabil Bonsu, Dipan Kundu
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引用次数: 0
Abstract
Interfacial stability issues at the cathode remain a bottleneck to developing durable and high-power all-solid-state lithium batteries (ASSLBs). In fact, the presence of conductive carbon in the cathode, necessary for high capacity and power capability, is believed to aggravate the stability woes. Thus, it is typically excluded from the cathode mix. Herein, employing a model functionalized carbon, it is shown that a small carbon surface oxygen functionality can in situ engineer a robust carbon–solid electrolyte interphase, which arrests conductive carbon-mediated degradation of Li6PS5Cl into reactive polysulfides that degrades the active LiNi1/3Mn1/3Co1/3O2 (NMC) cathode. Such interfacial stabilization, as confirmed by ex situ spectroscopic and in situ impedance analysis, combined with fast charge transport facilitated by functionalized yet conductive carbon and lowly resistive cathode interphases, elevates the performance. This is evidenced by stable cycling at room temperature (22 °C) and elevated temperatures (60 °C), high rate capability, a Coulombic efficiency of 99.8%, and ≈100% capacity retention after 1000 cycles and >90% retention over 2000 cycles at 60 °C. Functionalized carbon-mediated in situ cathode interfacial engineering offers a simple and scalable approach to designing durable ASSLB cathodes, with the potential for broader application across various NMC cathodes and compatible solid electrolytes.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.