Journal profile · Engineering-Electrical and Electronic Engineering
iEnergy
ISSN 2771-9197 · Tsinghua University Press · China
iEnergy: CAS Zone 4 · Engineering (2025 upgraded edition); impact factor 5.7 (journal website); diamond open access (no APC); no APC; review about 8 weeks (community reports); 35 articles in 2025; indexed in ESCI and Scopus.
Scope
Aims, scope and focus
iEnergy is published by Tsinghua University Press and is in Zone 4 of Engineering in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Microgrid Control and Optimization, Smart Grid Energy Management and Integrated Energy Systems Optimization, together about 28.9% of its articles. Its main subfields are Electrical and Electronic Engineering. (generated from OpenAlex topic counts and CAS ranking data)
iEnergy (Published by Tsinghua University Press and hosted in IEEE Xplore), has multiple meanings, intelligent energy, innovation for energy, internet of energy, and electrical energy due to "i" is the symbol of current. iEnergy, publishing quarterly, is a cross disciplinary journal aimed at disseminating frontiers of technologies and solutions of power and energy. The journal publishes papers (Types Including Articles*, Letters*, Reviews*, Editorials, Research Highlights, and News & Views. *These types of papers go through single-blind peer-review, others are in-house invited and do not go through peer review.) on exploring all aspects of power and energy, including any kind of technologies and applications from power generation, transmission, distribution, to conversion, utilization, and storage. iEnergy provides a platform for delivering cutting-edge advancements of sciences and technologies for the future-generation power and energy systems. The scope covers, but is not limited to:Energies for Electricity GenerationHydro EnergyFossil EnergyNuclear EnergyWind EnergySolar EnergyHydrogen Energy and Fuel CellsBioenergyOther Emerging EnergiesPower and Energy SystemsElectric Power DeliveryEnergy EquipmentPower System Operation and ControlEnergy System IntegrationDigital Energy SystemsEnergy Economics, Policies and StrategiesLow Carbon Energy TechnologiesEnergy Conversion and UtilizationElectric Power ConversionElectric Machine SystemsEnergy System for TransportationEnergy System for IndustryEnergy System for ResidenceEnergy HarvestingEnergy StorageiEnergy is indexed by ESCI, EI Compendex, Scopus, DOAJ, and Inspec.iEnergy is a fully open access journal. It is sponsored by Tsinghua University, published by Tsinghua University Press, and academically supported by the Department of Electrical Engineering, Tsinghua University. At its discretion, Tsinghua University Press will pay the Open Access Fee for all published papers from 2022 to 2026.Publication Ethics of iEnergyiEnergy Word Template
From the journal's Aims & Scope
Research area (LetPub): Engineering-Electrical and Electronic Engineering
Editor-in-chief Jinliang HePublisher website
Main research topics OpenAlex counts of recent articles; shares are approximate
- Microgrid Control and OptimizationEngineering11.6%
- Smart Grid Energy ManagementEngineering8.7%
- Integrated Energy Systems OptimizationEngineering8.7%
- Optimal Power Flow DistributionEngineering5.8%
- Advanced Battery Technologies ResearchEngineering5.4%
- Electric Vehicles and InfrastructureEngineering5.1%
- Power Systems and Renewable EnergyEnergy4.3%
- Power System Optimization and StabilityEngineering4%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Engineering Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 4 |
| Minor | Energy & Fuels | Zone 4 |
| Minor | Engineering, Electrical & Electronic | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Engineering Zone 2
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 2 |
| Minor | Energy & Fuels | Zone 3 |
| Minor | Engineering, Electrical & Electronic | Zone 3 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Not covered
Not covered by this edition.
Database indexing
ESCIScopusDOAJLetPub
International journal early-warning lists: not listed in any editionLetPub
Indexing the journal's website claims
EI CompendexINSPECPublisher website
As the journal's website lists them, not checked against each database; for Web of Science editions the records above apply.
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor (publisher)
- 5.7Publisher website ·
- CiteScore 2026-06
- 11.9LetPub ·
- CiteScore (publisher)
- 11.9Publisher website ·
- SJR 2026-06
- 1.22LetPub ·
- SNIP 2026-06
- 1.64LetPub ·
- h-index
- 23OpenAlex ·
- i10-index
- 49OpenAlex ·
- 2-year mean citedness
- 4.17OpenAlex ·
- Self-citation rate
- 1.8%LetPub ·
- Share of gold OA articles
- 100%LetPub ·
Volume
- Articles per year
- 25LetPub ·
- Articles per year (publisher)
- 2,022Publisher website ·
Articles by year OpenAlex count · 224 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 28 | 28 | 4 |
| 2025 | 35 | 35 | 88 |
| 2024 | 39 | 39 | 333 |
| 2023 | 58 | 58 | 449 |
| 2022 | 64 | 64 | 1,057 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
- Average review time (community reports)
- about 8 weeksLetPub ·
- Submission to publication (journal-reported)
- about 8 weeksDOAJ ·
- Peer review
- Single anonymous peer reviewDOAJ
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Diamond open access (no APC)DOAJ
Every article is open access and authors pay no article processing charge.
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| DOAJ | No APC | No | CC BY | |
| LetPub | No APC | No | — |
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Profile
Publication details and official links
- Publisher
- Tsinghua University Press
- Country or region
- China
- Language
- English
- ISSN
- 2771-9197
- Official links
- Journal homepage ↗LetPub
- Submission system ↗Publisher website
- Author guidelines ↗LetPub
- Aims & Scope ↗LetPub
- APC information ↗DOAJ
- Open access statement ↗DOAJ
- License & copyright ↗DOAJ
- Peer review process ↗LetPub
- Editorial board ↗LetPub
- Plagiarism policy ↗DOAJ
FAQ
Frequently asked questions about iEnergy
What CAS zone is iEnergy in?
In the 2025 upgraded edition of the CAS Journal Ranking, iEnergy is in Zone 4 of Engineering, and in Zone 4 of the minor category Energy & Fuels / Engineering, Electrical & Electronic. In the 2026 Xinrui edition it is in Zone 2 of Engineering. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of iEnergy?
The journal's website gives an impact factor of 5.7; this is the journal's own figure, as LetPub lists none for it; CiteScore 11.9, h-index 23.
How long does peer review take at iEnergy?
Authors report an average review time of about 8 weeks. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index iEnergy?
According to LetPub and DOAJ records, iEnergy is indexed in ESCI, Scopus and DOAJ. The journal's website also lists EI Compendex and INSPEC; that list has not been checked against each database.
Is iEnergy open access, and what is the APC?
iEnergy is a diamond open-access journal (no APC). It charges no article processing charge.
Sources and updates
The facts on this page come from LetPub, Publisher website, OpenAlex, DOAJ; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .