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Inorganics
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Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage
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Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage

A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Materials".

Deadline for manuscript submissions: 31 August 2026 | Viewed by 7586

Special Issue Editor

Dr. Ting Deng

E-Mail Website
Guest Editor
Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, Changchun 130012, China
Interests: batteries; electrochemistry; energy storage and conversion; electrode materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Since the first commercialization of lithium-ion batteries in 1991, energy storage devices (ESDs) have become indispensable in every aspect of daily life. As technological products evolve at an astonishing pace, it is necessary for next-generation ESDs to ensure a high energy density, high power density and stability, which are based on innovative electrode chemistries. In the long term, the efficient utilization of lithium resources and alternative innovative electrode chemistries beyond lithium are needed. Ideal electrode chemistry involves multiple electron transfer, fast charge/discharge kinetics and high stability but also inferior conductivity, high polarization and other undesired physical/chemical factors. ESDs such as secondary metal/non-metal ion batteries, gas batteries, flow batteries, supercapacitors, fuel cells and others should be significantly improved to meet our daily demand and address these disadvantages. Therefore, in this Special Issue, we wish to present the most recent advances in electrode chemistries with innovative designs in the abovementioned ESDs.

Dr. Ting Deng
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Inorganics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electrochemical energy storage
  • innovative electrode chemistry
  • advanced electrode materials
  • high-performance energy storage devices

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Published Papers (5 papers)

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Research

11 pages, 2474 KB  
Article
Mn2+ Pre-Embedded V2CTx MXene as a Negative Electrode for Lithium-Ion Batteries
by Hao Yu, Mingguo Xu, Zhaoliang Yu, Jiaming Li, Ming Lu, Shichong Xu and Haibo Li
Inorganics 2026, 14(2), 65; https://doi.org/10.3390/inorganics14020065 - 22 Feb 2026
Cited by 1 | Viewed by 523
Abstract
V2CTx MXene is a promising anode material for lithium-ion batteries due to its high electrical conductivity and abundant active sites. However, the spatial environment within its layers restricts the function of its energy storage electrode. Herein, V2CTx [...] Read more.
V2CTx MXene is a promising anode material for lithium-ion batteries due to its high electrical conductivity and abundant active sites. However, the spatial environment within its layers restricts the function of its energy storage electrode. Herein, V2CTx MXene was synthesized via an NH4F–HCl-assisted hydrothermal etching method, followed by electrochemical pre-intercalation of Mn2+ using a three-electrode system. Structural characterizations confirm that Mn2+ pre-intercalation effectively modulates the interlayer environment, reduces surface F terminations, and maintains a stable layered structure. Electrochemical measurements demonstrate that the Mn2+-intercalated V2CTx MXene delivers an enhanced reversible capacity of 313.6 mAh·g−1 after 200 cycles, outperforming pristine V2CTx MXene. The improved rate capability and reduced charge transfer resistance indicate accelerated ion/electron transport kinetics. This study provides an effective interlayer engineering strategy for improving MXene-based lithium-ion storage performance. Full article
(This article belongs to the Special Issue Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage)
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14 pages, 3391 KB  
Article
Synthesis and Lithium Storage Properties of Spinel (Al0.2Mn0.2Co0.2Ni0.2Zn0.2)3O4 High-Entropy Oxide
by Changqing Jin, Mingyu Yuan, Dengyu Tian, Jiaying Jian, Yongxing Wei, Ruihua Nan, Zhong Yang and Qingping Ding
Inorganics 2026, 14(1), 1; https://doi.org/10.3390/inorganics14010001 - 19 Dec 2025
Cited by 2 | Viewed by 646
Abstract
High-entropy oxides (HEOs) have garnered significant interest as next-generation anode materials for lithium-ion batteries (LIBs) due to their high theoretical specific capacity and excellent structural stability. This study successfully synthesized spinel-structured (Al0.2Mn0.2Co0.2Ni0.2Zn0.2)3 [...] Read more.
High-entropy oxides (HEOs) have garnered significant interest as next-generation anode materials for lithium-ion batteries (LIBs) due to their high theoretical specific capacity and excellent structural stability. This study successfully synthesized spinel-structured (Al0.2Mn0.2Co0.2Ni0.2Zn0.2)3O4 HEO via a sol–gel method. The material was characterized by XRD, Raman and TEM, confirming a homogeneous single-phase spinel structure, with uniformly distributed elements-a hallmark of HEOs. Electrochemical tests demonstrated a stable cycling performance (438 mAh g−1 at 100 mA g−1 after 100 cycles and 350 mAh g−1 at 1 A g−1 after 1000 cycles) and rate capacity of 159 mAh g−1 at 2 A g−1, The remarkable long-term cyclability and good rate capability highlight the potential of this HEO for practical applications in durable, high-power lithium-ion batteries. This work underscores the advantage of incorporating structurally stabilizing elements in HEOs for advanced energy storage. Full article
(This article belongs to the Special Issue Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage)
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13 pages, 1876 KB  
Article
Fe Species Intercalation Confined by the Interlayer Environment of V2CTx MXene for Lithium-Ion Storage
by Jiaxin Li, Miao Liu, Jiaming Li, Wenjuan Han, Shichong Xu, Haibo Li and Ming Lu
Inorganics 2025, 13(9), 290; https://doi.org/10.3390/inorganics13090290 - 28 Aug 2025
Cited by 2 | Viewed by 1296
Abstract
This work successfully achieved pre-intercalation of Fe species in V2CTx MXene through an annealing method. The crystallographic structure, microscopic morphology, and functional groups of the samples before and after pre-intercalation were analyzed by XRD, SEM, and FTIR, and the electrochemical performance of MXene [...] Read more.
This work successfully achieved pre-intercalation of Fe species in V2CTx MXene through an annealing method. The crystallographic structure, microscopic morphology, and functional groups of the samples before and after pre-intercalation were analyzed by XRD, SEM, and FTIR, and the electrochemical performance of MXene electrodes was studied. Research has shown that the interlayer spacing of pre-intercalated MXene increases with an increase in annealing temperature. The interlayer spacing of MXene annealed at 800 °C is 13.1% higher than that of the original MXene. However, the morphology of the samples was damaged by excessively high annealing temperatures, which also weakened the lithium-ion storage performance. In contrast, the cycling performance of MXene electrodes annealed at 400 °C showed the greatest improvement, reaching 71.65%. This is because iron species, acting as a pillar support structure, expand the interlayer spacing and broaden the transport channels for lithium ions. Meanwhile, high-temperature annealing generates more oxygen-containing functional groups, which provide additional active sites for lithium-ion transport, promote the kinetics of electrode reactions, and thus enhance its lithium-ion storage performance. Full article
(This article belongs to the Special Issue Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage)
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13 pages, 4335 KB  
Article
Mg-Doped O3-Na[Ni0.6Fe0.25Mn0.15]O2 Cathode for Long-Cycle-Life Na-Ion Batteries
by Zebin Song, Hao Zhou, Yin Zhang, Haining Ji, Liping Wang, Xiaobin Niu and Jian Gao
Inorganics 2025, 13(8), 261; https://doi.org/10.3390/inorganics13080261 - 4 Aug 2025
Cited by 3 | Viewed by 3061
Abstract
The O3-type layered oxide materials have the advantage of high specific capacity, which makes them more competitive in the practical application of cathode materials for sodium-ion batteries (SIBs). However, the existing reported O3-type layered oxide materials still have a complex irreversible phase transition [...] Read more.
The O3-type layered oxide materials have the advantage of high specific capacity, which makes them more competitive in the practical application of cathode materials for sodium-ion batteries (SIBs). However, the existing reported O3-type layered oxide materials still have a complex irreversible phase transition phenomenon, and the cycle life of batteries needs, with these materials, to be further improved to meet the requirements. Herein, we performed structural characterization and electrochemical performance tests on O3-NaNi0.6−xFe0.25Mn0.15MgxO2 (x = 0, 0.025, 0.05, and 0.075, denoted as NFM, NFM-2.5Mg, NFM-5.0Mg, and NFM-7.5Mg). The optimized NFM-2.5Mg has the largest sodium layer spacing, which can effectively enhance the transmission rate of sodium ions. Therefore, the reversible specific capacity can reach approximately 148.1 mAh g−1 at 0.2C, and it can even achieve a capacity retention of 85.4% after 100 cycles at 1C, demonstrating excellent cycle stability. Moreover, at a low temperature of 0 °C, it also can keep capacity retention of 86.6% after 150 cycles at 1C. This study provides a view on the cycling performance improvement of sodium-ion layered oxide cathodes with a high theoretical specific capacity. Full article
(This article belongs to the Special Issue Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage)
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9 pages, 3386 KB  
Article
Reversible Sodium Storage of CoTe2 Anode via Lanthanum Doping
by Haonan Xie, Xiaolin Xie, Taijiao Guo and Ting Deng
Inorganics 2025, 13(6), 207; https://doi.org/10.3390/inorganics13060207 - 19 Jun 2025
Cited by 1 | Viewed by 1256
Abstract
Cobalt telluride (CoTe2) is considered an advanced anode material for sodium-ion batteries (SIBs) because of its high theoretical capacity and high conductivity. Nevertheless, the ionic radius of the Co2+ ion (0.74 Å) is smaller than that of the Na+ [...] Read more.
Cobalt telluride (CoTe2) is considered an advanced anode material for sodium-ion batteries (SIBs) because of its high theoretical capacity and high conductivity. Nevertheless, the ionic radius of the Co2+ ion (0.74 Å) is smaller than that of the Na+ ion, meaning the integrity of CoTe2 electrodes can be easily damaged when Na+ ions diffuse into CoTe2 and convert to large Na2Te. Herein, we propose a doping strategy by introducing an unreactive element but with a large radius to enhance the overall performance. Lanthanum (La) can be doped into the CoTe2 structure to counteract the size effect of Na2Te since La has a large radius. On the other hand, La with abundant electrons in CoTe2 can also facilitate the charge transfer during charge/discharge. As a result, La-doped CoTe2 (La-CoTe2) can deliver a maximum capacity of 345 mAh g−1 at 0.05 A g−1 and has a decent rate performance. After 2000 cycles at 2 A g−1, a capacity of 88 mAh g−1 remained, which is a notable improvement compared to undoped CoTe2. These results demonstrate the potential of rare earth elements in preparing advanced SIB electrode materials. Full article
(This article belongs to the Special Issue Innovative Electrode Chemistry for Next-Generation Electrochemical Energy Storage)
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