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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 58 7544 7293 412 399 190 23291

Kei Kubota publications per year

The chart shows the history of publications by Kei Kubota between 1994 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Kei Kubota published across 33 years, from 1994 to 2026, averaging 7.3 papers a year. Output peaked at 29 publications in 2014. 8 of the 240 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1994 to 2026. Vertical axis: number of publications, 0 to 29. Peak 29 publications in 2014. 1994: 1 publication 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 1 publication 1999: 0 publications 2000: 3 publications 2001: 1 publication 2002: 1 publication 2003: 4 publications 2004: 3 publications 2005: 0 publications 2006: 3 publications 2007: 1 publication 2008: 6 publications 2009: 2 publications 2010: 9 publications 2011: 5 publications 2012: 9 publications 2013: 7 publications 2014: 29 publications 2015: 9 publications 2016: 22 publications 2017: 16 publications 2018: 13 publications 2019: 18 publications 2020: 22 publications 2021: 22 publications 2022: 9 publications 2023: 6 publications 2024: 10 publications 2025: 7 publications 2026: 1 publication
1994 2026

240 publications in total across all disciplines

View publications per year as a table
Kei Kubota: publications per year, 1994 to 2026
Year Publications
1994 1
1995 0
1996 0
1997 0
1998 1
1999 0
2000 3
2001 1
2002 1
2003 4
2004 3
2005 0
2006 3
2007 1
2008 6
2009 2
2010 9
2011 5
2012 9
2013 7
2014 29
2015 9
2016 22
2017 16
2018 13
2019 18
2020 22
2021 22
2022 9
2023 6
2024 10
2025 7
2026 1
Total 240
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Kei Kubota publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Kei Kubota sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 190–209 publications, is where this scientist sits. 50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50–69 publications 1,163+

This scientist: 190 publications — 27th percentile

27% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723
150–169 835
170–189 850
190–209 891 190
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593
310–329 537
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Kei Kubota D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Kei Kubota sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 58–59 D-Index, is where this scientist sits. 40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40–41 D-Index 165+

This scientist: 58 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450
44–45 612
46–47 612
48–49 598
50–51 657
52–53 667
54–55 621
56–57 597
58–59 610 58
60–61 587
62–63 606
64–65 533
66–67 490
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Overview

Kei Kubota is affiliated with Tokyo University of Science in Japan and has an extensive publication record primarily in the fields of Engineering and Materials Science. Their research predominantly focuses on Electrical and Electronic Engineering as well as subfields such as Electronic, Optical and Magnetic Materials, Automotive Engineering, Mechanical Engineering, and Materials Chemistry.

Their main research topics include:

  • Advancements in Battery Materials
  • Advanced Battery Materials and Technologies
  • Supercapacitor Materials and Fabrication
  • Advanced Battery Technologies Research
  • Extraction and Separation Processes
  • Transition Metal Oxide Nanomaterials

Kei Kubota has contributed to the following recent papers:

  • "Research Development on K-Ion Batteries," 2020, Chemical Reviews
  • "MgO-Template Synthesis of Extremely High Capacity Hard Carbon for Na-Ion Battery," 2020, Angewandte Chemie International Edition
  • "Structural Analysis of Sucrose-Derived Hard Carbon and Correlation with the Electrochemical Properties for Lithium, Sodium, and Potassium Insertion," 2020, Chemistry of Materials
  • "Impact of Ti and Zn Dual-Substitution in P2 Type Na2/3Ni1/3Mn2/3O2 on Ni-Mn and Na-Vacancy Ordering and Electrochemical Properties," 2023, Advanced Materials
  • "New Template Synthesis of Anomalously Large Capacity Hard Carbon for Na- and K-Ion Batteries," 2023, Advanced Energy Materials

Frequent co-authors in Kei Kubota's research include:

  • Shinichi Komaba
  • Tomooki Hosaka
  • Ryoichi Tatara
  • Eun Jeong Kim
  • Shinichi Kumakura

In terms of publication venues, Kei Kubota has contributed multiple articles to:

  • ECS Meeting Abstracts
  • Journal of Materials Chemistry A
  • Journal of Power Sources
  • Journal of The Electrochemical Society
  • Advanced Materials

Best Publications

  • Research Development on Sodium-Ion Batteries

    Naoaki Yabuuchi;Kei Kubota;Kei Kubota;Mouad Dahbi;Mouad Dahbi;Shinichi Komaba;Shinichi Komaba

  • Research Development on K-Ion Batteries.

    Tomooki Hosaka;Kei Kubota;Kei Kubota;A. Shahul Hameed;A. Shahul Hameed;Shinichi Komaba;Shinichi Komaba

  • Potassium intercalation into graphite to realize high-voltage/high-power potassium-ion batteries and potassium-ion capacitors

    Shinichi Komaba;Shinichi Komaba;Tatsuya Hasegawa;Mouad Dahbi;Mouad Dahbi;Kei Kubota;Kei Kubota

  • Towards K-Ion and Na-Ion Batteries as "Beyond Li-Ion".

    Kei Kubota;Kei Kubota;Mouad Dahbi;Mouad Dahbi;Tomooki Hosaka;Shinichi Kumakura

  • Review-Practical Issues and Future Perspective for Na-Ion Batteries

    Kei Kubota;Kei Kubota;Shinichi Komaba;Shinichi Komaba

  • Negative electrodes for Na-ion batteries.

    Mouad Dahbi;Mouad Dahbi;Naoaki Yabuuchi;Naoaki Yabuuchi;Kei Kubota;Kei Kubota;Kazuyasu Tokiwa

  • P2-type Na2/3Ni1/3Mn2/3−xTixO2 as a new positive electrode for higher energy Na-ion batteries

    Hiroaki Yoshida;Naoaki Yabuuchi;Kei Kubota;Issei Ikeuchi

  • A novel K-ion battery: hexacyanoferrate(II)/graphite cell

    Xiaofei Bie;Kei Kubota;Kei Kubota;Tomooki Hosaka;Kuniko Chihara

  • MgO-Template Synthesis of Extremely High Capacity Hard Carbon for Na-Ion Battery

    Azusa Kamiyama;Kei Kubota;Kei Kubota;Daisuke Igarashi;Yong Youn

  • New O2/P2‐type Li‐Excess Layered Manganese Oxides as Promising Multi‐Functional Electrode Materials for Rechargeable Li/Na Batteries

    Naoaki Yabuuchi;Naoaki Yabuuchi;Ryo Hara;Masataka Kajiyama;Kei Kubota

  • A new electrode material for rechargeable sodium batteries: P2-type Na2/3[Mg0.28Mn0.72]O2 with anomalously high reversible capacity

    Naoaki Yabuuchi;Naoaki Yabuuchi;Ryo Hara;Kei Kubota;Kei Kubota;Jens Paulsen

  • KVPO4F and KVOPO4 toward 4 volt-class potassium-ion batteries

    Kuniko Chihara;Akihiro Katogi;Kei Kubota;Kei Kubota;Shinichi Komaba;Shinichi Komaba

  • Electrochemistry and Solid-State Chemistry of NaMeO2 (Me = 3d Transition Metals)

    Kei Kubota;Kei Kubota;Shinichi Kumakura;Yusuke Yoda;Kazutoshi Kuroki

  • Sodium and Manganese Stoichiometry of P2-Type Na2/3 MnO2.

    Shinichi Kumakura;Shinichi Kumakura;Yoshiyuki Tahara;Kei Kubota;Kei Kubota;Kuniko Chihara

  • Synthesis of hard carbon from argan shells for Na-ion batteries

    Mouad Dahbi;Mouad Dahbi;Manami Kiso;Kei Kubota;Kei Kubota;Tatsuo Horiba

  • P2- and P3-KxCoO2 as an electrochemical potassium intercalation host

    Yuya Hironaka;Kei Kubota;Kei Kubota;Shinichi Komaba;Shinichi Komaba

  • Layered oxides as positive electrode materials for Na-ion batteries

    Kei Kubota;Kei Kubota;Naoaki Yabuuchi;Naoaki Yabuuchi;Hiroaki Yoshida;Mouad Dahbi;Mouad Dahbi

  • Black Phosphorus as a High-Capacity, High-Capability Negative Electrode for Sodium-Ion Batteries: Investigation of the Electrode/Electrolyte Interface

    Mouad Dahbi;Mouad Dahbi;Naoaki Yabuuchi;Naoaki Yabuuchi;Mika Fukunishi;Kei Kubota;Kei Kubota

  • Structural Analysis of Sucrose-Derived Hard Carbon and Correlation with the Electrochemical Properties for Lithium, Sodium, and Potassium Insertion

    Kei Kubota;Kei Kubota;Saori Shimadzu;Naoaki Yabuuchi;Naoaki Yabuuchi;Satoshi Tominaka

  • Rechargeable potassium-ion batteries with honeycomb-layered tellurates as high voltage cathodes and fast potassium-ion conductors.

    Titus Masese;Kazuki Yoshii;Yoichi Yamaguchi;Toyoki Okumura

  • Sodium carboxymethyl cellulose as a potential binder for hard-carbon negative electrodes in sodium-ion batteries

    Mouad Dahbi;Mouad Dahbi;Takeshi Nakano;Naoaki Yabuuchi;Naoaki Yabuuchi;Toru Ishikawa

Frequent Co-Authors

Shinichi Komaba
Shinichi Komaba Tokyo University of Science
Naoaki Yabuuchi
Naoaki Yabuuchi Yokohama National University
Ryoji Kanno
Ryoji Kanno Tokyo Institute of Technology
Masaaki Hirayama
Masaaki Hirayama Tokyo Institute of Technology
Koichi Yamashita
Koichi Yamashita University of Tokyo
Koji Otsuka
Koji Otsuka Kyoto University
Yoshitaka Tateyama
Yoshitaka Tateyama National Institute for Materials Science
Hitoshi Shiku
Hitoshi Shiku Tohoku University
Arnd Garsuch
Arnd Garsuch BASF (United States)
Tomokazu Matsue
Tomokazu Matsue Tohoku University

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