# Suppressing Formation of Zn─Mn─O Phases by In Situ Ti Decoration of MnO<sub>2</sub> for Long Lifespan MnO<sub>2</sub>‐Zn Battery

https://mdr.nims.go.jp/datasets/5c5d7114-880f-439c-9239-bfbb416ef2ea

## File

- [Duanetal2024_Suppressing Formation of Zn Mn O Phases by In Situ Ti Decoration of MnO2 for Long Lifespan MnO2‐Zn.pdf](https://mdr.nims.go.jp/filesets/7abe2b3c-17d5-4bbb-be48-7dcbe12aac6a/download) ([Detail](https://mdr.nims.go.jp/filesets/7abe2b3c-17d5-4bbb-be48-7dcbe12aac6a.md))
- [smll202404368-sup-0001-SuppMat_2.docx](https://mdr.nims.go.jp/filesets/b318f471-108a-4cb4-8dfc-f44f452ef04f/download) ([Detail](https://mdr.nims.go.jp/filesets/b318f471-108a-4cb4-8dfc-f44f452ef04f.md))

## Id

5c5d7114-880f-439c-9239-bfbb416ef2ea

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-09-17T13:41:44.604993Z

## Updated at

2024-09-18T07:30:20.603806Z

## Published at

2024-09-18T07:30:20.972168Z

## Doi



## First published url

https://doi.org/10.1002/smll.202404368

## Date published

2024-07-17

## Recorded date published

2024-11

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Suppressing Formation of Zn─Mn─O Phases by In Situ Ti Decoration of MnO<sub>2</sub>
    for Long Lifespan MnO<sub>2</sub>‐Zn Battery
  title_type: original
  lang: en

## Description

- description: Mildly-acid MnO2-Zn batteries have been considered as a promising alternative
    for large scale energy storage systems for their low toxicity, high safety, and
    low cost. Despite receiving much research attention, the charge-discharge mechanism
    remains unclear, and formation of inactive phases still hinders the further development
    of the batteries. In this study, we clarify that the co-precipitation of Zn and
    Mn during the charge process is the main cause of the formation of inactive Zn-Mn-O
    phases in MnO2 which leads to capacity fading upon cycling. Our results show that
    the addition of TiOSO4 as a facile electrolyte additive suppresses the emergence
    of the inactive phases by forming a Ti-doped MnO2 during cycling, thereby improving
    the cycling stability of the electrode. As a result, under a current of 1200 mA
    g-1, the MnO2 electrode still gives a capacity of 230 mAh g-1 for over 1500 cycles.
    Capacity retention is 80% after 6000 cycles under a current rate of 3600 mA g-1,
    while it is 75% after 10000 cycles under a current rate of 4800 mA g-1. These
    findings provide fundamental insights on the degradation mechanism of MnO2 and
    a new strategy to improve the electrochemical performance of aqueous MnO2-Zn batteries.
  description_type: abstract
  lang: und

## Creator

- name: Qiaohui Duan
  role: author
- name: Yiyi Zheng
  role: author
- name: Yu Zhou
  role: author
- name: Shuyu Dong
  role: author
- name: Calvin Ku
  role: author
- name: Patrick H.‐L. Sit
  role: author
- name: Denis Y. W. Yu
  role: author
  orcid: https://orcid.org/0000-0002-5883-7087

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: aqueous zinc-ion batteries
  schema: not_defined
- subject: manganese dioxide
  schema: not_defined
- subject: electrolyte additive
  schema: not_defined
- subject: phase formation
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Small
  issn: '16136810'
  article_number: '2404368'

## Conference



## Related item



## Funding

- identifier: PJ9229008
  funder_name: University Grants Committee

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 7abe2b3c-17d5-4bbb-be48-7dcbe12aac6a
  filename: Duanetal2024_Suppressing Formation of Zn Mn O Phases by In Situ Ti Decoration
    of MnO2 for Long Lifespan MnO2‐Zn.pdf
  content_type: application/pdf
  size: 5475986
  md5: 33961a2cf10245789458cb8e0f5bea5a
- id: b318f471-108a-4cb4-8dfc-f44f452ef04f
  filename: smll202404368-sup-0001-SuppMat_2.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 1860836
  md5: 19601c42bc32ba9ff1dbad477ce98225

## Thumbnail

fileset_id: 7abe2b3c-17d5-4bbb-be48-7dcbe12aac6a
filename: Duanetal2024_Suppressing Formation of Zn Mn O Phases by In Situ Ti Decoration
  of MnO2 for Long Lifespan MnO2‐Zn.pdf