Recent Advances in Flexible Self-Powered Sensors in Piezoelectric, Triboelectric, and Pyroelectric Fields
, Feiyu Wang 1, Jiangbo Hua 1, Wen Cheng 2,*, Yi Shi 1,* and Lijia Pan 1,*Round 1
Reviewer 1 Report
Comments and Suggestions for Authors
This manuscript reviews the recent progress of flexible sensors based on piezoelectric, triboelectric, pyroelectric and hybrid mechanisms. The authors provided detailed discussions from functional materials, preparation processes to device structures. Overall, it can be considered for publication but the following concerns need to be addressed first.
1. Piezoelectric nanogenerator is broadly accepted as PENG by scholars in the community, thus it is suggested to use PENG instead of PiENG.
2. There have been many review articles on the self-powered devices using piezoelectric, triboelectric and pyroelectric mechanisms, what is the difference and necessity of this review?
3. A comparison table of different self-powered mechanisms in terms of their properties, pros and cons would help the readers to understand better.
4. The materials and applications listed in Fig. 2 are a bit confuse, and there are too many sub figures. Please rearrange it with more clear logic and key points.
5. It is suggested to add a summarized title for Fig. 3 to Fig. 10 for more straightforward understanding.
6. There are quite a few of formatting and grammar errors in the manuscript, please go through the whole manuscript more carefully, such as Line 29, there is an extra space; Line 145, 22pm/v should be 22pm/V; etc.
Comments on the Quality of English Language
English is fine with minor revision required.
Author Response
Comment 1:Piezoelectric nanogenerator is broadly accepted as PENG by scholars in the community, thus it is suggested to use PENG instead of PiENG.
Response 1:We really appreciate the reviewer’s positive and valuable comments. We have carefully improved the manuscript accordingly. We have changed all the "PiENG" to "PENG" and marked them in red font.
Comment 2:There have been many review articles on the self-powered devices using piezoelectric, triboelectric and pyroelectric mechanisms, what is the difference and necessity of this review?
Response 2:We really appreciate the reviewer’s rigorous evaluation and valuable comments. Sorry for not highlighting the differences between this review and other reviews in the abstract and introduction. First of all, the articles selected in this review are the latest published in the last five years, with high timeliness, which is convenient to provide readers with updated research trends. Second, compared with the review of other self-powered types, we will focus on the improvement of device preparation process and the use of new materials. For example, ball milling or electrophoresis is used to promote the polarization and sequential arrangement of piezoelectric materials to improve the piezoelectric response, and doping modification of two-dimensional materials is used to improve the triboelectric response. Finally, the research progress of composite mode nanogenerators is reviewed in this review, which is rarely mentioned in other articles. We have also compensated for the innovations of this review in the abstract and introduction, with text marked in red.
Comment 3:A comparison table of different self-powered mechanisms in terms of their properties, pros and cons would help the readers to understand better.
Response 3:We really appreciate the reviewer’s valuable comments. We summarize the material selection, power generation capacity, advantages and disadvantages of different self-power supply mechanisms in Table 1.
Table 1. Comparison of three power generation modes in terms of material selection, power generation performance, advantages and disadvantages
|
category |
materials |
electricity generation performance |
advantages |
disadvantages |
|
PENG |
Organic materials: PVDF and its copolymers, piezoelectric biomaterials |
The d33 value is generally around tens of pC/N. |
Intrinsic flexibility, easy doping modification |
Weak piezoelectric response, high polarization voltage |
|
Inorganic materials: ZnO, perovskite ceramics, two-dimensional materials and so on |
The d33 value is generally around hundreds of pC/N. |
High and stable piezoelectric output |
High hardness and resistance to bending |
|
|
Composite piezoelectric materials |
The piezoelectric response is intermediate between organic and inorganic materials |
With both flexible and high voltage output |
Complex preparation process |
|
|
TENG |
Materials with triboelectric polarity differences match each other: MXene, PTFE, Graphene and its derivatives, two-dimensional materials and so on |
The output voltage can reach hundreds to thousands of volts. |
High output voltage, low material requirements, simple preparation |
It is susceptible to environmental factors such as temperature, humidity, and impact. Wear causes a reduction in its service life |
|
PyNG |
Similar to the materials used in piezoelectric devices, most of them are ferroelectric. |
The pyroelectric coefficient of organic pyroelectric materials is generally in the tens of μC/(m2K) while that of inorganic pyroelectric materials is typically in the hundreds or even thousands μC/(m2K) |
It can be used for applications such as temperature sensing, ultraviolet/infrared light detection, and thermal imaging |
The temperature response range of the devices is relatively low or narrow, the microscopic mechanism of the pyroelectric effect is insufficiently studied, and it has received limited attention. |
Comment 4:The materials and applications listed in Fig. 2 are a bit confuse, and there are too many sub figures. Please rearrange it with more clear logic and key points.
Response 4:We really appreciate the reviewer’s positive and valuable comments. We have carefully improved the manuscript accordingly. In order to make the picture more intuitive and concise, we have simplified the subgraphs and labeled the categories.
Comment 5:It is suggested to add a summarized title for Fig. 3 to Fig. 10 for more straightforward understanding.
Response 5:We really appreciate the reviewer’s meticulous and valuable comments. Sorry for the omission of a summary of each image. We've added them and marked them in red.
Comment 6:There are quite a few of formatting and grammar errors in the manuscript, please go through the whole manuscript more carefully, such as Line 29, there is an extra space; Line 145, 22pm/v should be 22pm/V; etc.
Response 6:We really appreciate the reviewer’s meticulous evaluation and valuable comments. We have revised these words and marked them in red, please refer to the revised manuscript for details.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for Authors
The manuscript titled "Recent advances in flexible self-power sensors in piezoelectric, triboelectric and pyroelectric fields ". In this manuscript, the authors have gaven a comprehensive exploration of rect breakthroughs in flexible sensor research in piezoelectric, triboelectric and pyroelectric fields. However, some points remain unclear, necessitating minor revisions prior to publication:
1. It would be better to include to the working mechanismof three fields.
2. The authors could give a comprehensive comparison table for this field like material selection, electrical performance and ects.
3. There are so many review aritlces for self-power sensors. The authors should give the point what is the novelty for this paper?
Comments on the Quality of English Language
Minor editing of English language required
Author Response
Comment 1:It would be better to include to the working mechanism of three fields.
Response 1:We really appreciate the reviewer’s positive and valuable comments. We have carefully improved the manuscript accordingly. We have added the original explanation of the three power generation mechanisms in the corresponding places, marked with red font.
Comment 2:The authors could give a comprehensive comparison table for this field like material selection, electrical performance and ects.
Response 2:We really appreciate the reviewer’s valuable comments. We summarize the material selection, power generation capacity, advantages and disadvantages of different self-power supply mechanisms in Table 1.
Table 1. Comparison of three power generation modes in terms of material selection, power generation performance, advantages and disadvantages
|
category |
materials |
electricity generation performance |
advantages |
disadvantages |
|
PENG |
Organic materials: PVDF and its copolymers, piezoelectric biomaterials |
The d33 value is generally around tens of pC/N. |
Intrinsic flexibility, easy doping modification |
Weak piezoelectric response, high polarization voltage |
|
Inorganic materials: ZnO, perovskite ceramics, two-dimensional materials and so on |
The d33 value is generally around hundreds of pC/N. |
High and stable piezoelectric output |
High hardness and resistance to bending |
|
|
Composite piezoelectric materials |
The piezoelectric response is intermediate between organic and inorganic materials |
With both flexible and high voltage output |
Complex preparation process |
|
|
TENG |
Materials with triboelectric polarity differences match each other: MXene, PTFE, Graphene and its derivatives, two-dimensional materials and so on |
The output voltage can reach hundreds to thousands of volts. |
High output voltage, low material requirements, simple preparation |
It is susceptible to environmental factors such as temperature, humidity, and impact. Wear causes a reduction in its service life |
|
PyNG |
Similar to the materials used in piezoelectric devices, most of them are ferroelectric. |
The pyroelectric coefficient of organic pyroelectric materials is generally in the tens of μC/(m2K) while that of inorganic pyroelectric materials is typically in the hundreds or even thousands μC/(m2K) |
It can be used for applications such as temperature sensing, ultraviolet/infrared light detection, and thermal imaging |
The temperature response range of the devices is relatively low or narrow, the microscopic mechanism of the pyroelectric effect is insufficiently studied, and it has received limited attention. |
Comment 3: There are so many review aritlces for self-power sensors. The authors should give the point what is the novelty for this paper?
Response 3: We really appreciate the reviewer’s rigorous evaluation and valuable comments. Sorry for not highlighting the differences between this review and other reviews in the abstract and introduction. First of all, the articles selected in this review are the latest published in the last five years, with high timeliness, which is convenient to provide readers with updated research trends. Second, compared with the review of other self-powered types, we will focus on the improvement of device preparation process and the use of new materials. For example, ball milling or electrophoresis is used to promote the polarization and sequential arrangement of piezoelectric materials to improve the piezoelectric response, and doping modification of two-dimensional materials is used to improve the triboelectric response. Finally, the research progress of composite mode nanogenerators is reviewed in this review, which is rarely mentioned in other articles. We have also compensated for the innovations of this review in the abstract and introduction, with text marked in red.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Comments and Suggestions for Authors
The authors have addressed my comments properly, and the manuscript can be accepted now.
Author Response
Thank you for your detailed and scientific suggestions. Wishing you all the best in your work.
