Venkanna Mekala

@bvrithyderabad.edu.in

ASSISTANT PROFESSOR, PHYSICS
BVRIT HYDERABAD COLLEGE OF ENGINEERING FOR WOMEN

Venkanna Mekala


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https://researchid.co/venkioptics

EDUCATION

M.Sc, Ph.D

RESEARCH INTERESTS

Optics, Optical Systems, Optical Image processing
8

Scopus Publications

87

Scholar Citations

5

Scholar h-index

3

Scholar i10-index

Scopus Publications

  • Impedance and Electric Modulus Analysis of Sodium Ion-Conducting PVA-Based Solid Polymer Electrolytes
    Anji Reddy Polu, Vaidya Sharanya, Mekala Venkanna, Firdaus Mohamad Hamzah
    Macromolecular Symposia, 2026
    Solid polymer electrolytes (SPEs) have attracted considerable attention for potential use in energy storage and electrochemical devices. In this study, sodium‐ion conducting solid polymer electrolytes based on polyvinyl alcohol (PVA) complexed with sodium tetrafluoroborate (NaBF4) were prepared by using the solution casting technique and systematically characterized. The SPEs were investigated using impedance spectroscopy, ionic conductivity analysis, electric modulus formalism, and transference number measurements. Impedance studies revealed the frequency‐dependent behavior of the polymer matrix, highlighting key transport properties. The ionic conductivity measurements demonstrated enhanced ion transport with increasing NaBF4 content, with the highest conductivity (8.47 × 10−7 S/cm) observed at 20 wt.% salt concentration. The electric modulus investigation provided insights into the relaxation dynamics and charge carrier mobility within the polymer matrix. Additionally, transference number measurements confirmed that ionic species are the primary charge carriers.
  • Structural and Electrical Properties of NaCl-Modified Xanthan Gum Biopolymer Electrolytes for Energy Storage Applications
    Anji Reddy Polu, Mekala Venkanna, Venkata Ramana Jeedi, Firdaus Mohamad Hamzah
    Macromolecular Symposia, 2026
    Biopolymer electrolytes have emerged as promising materials for energy storage and electrochemical applications due to their eco‐friendliness, flexibility, and ionic conductivity. This study investigates xanthan gum (XG) complexed with sodium chloride (NaCl) as a sustainable, flexible solid biopolymer electrolyte (SBEs) for energy storage applications. SBE films were fabricated via solution casting and characterized using X‐ray diffraction (XRD), impedance spectroscopy, and dielectric analysis. XRD confirmed the amorphous nature of the XG: NaCl system, promoting ion transport. Impedance spectroscopy revealed a significant decrease in bulk resistance with NaCl doping, leading to enhanced ionic conductivity, reaching a maximum of 8.83 × 10 −6 S/cm at 30°C for 80XG: 20NaCl system. Dielectric analysis revealed significantly low‐frequency polarization, indicating excellent charge storage capabilities. These findings demonstrate that XG: NaCl SBEs are a highly promising, cost‐efficient solution for next‐generation electrochemical energy storage devices.
  • Performance enhancement of PEO: LiDFOB based nanocomposite solid polymer electrolytes via incorporation of POSS-PEG13.3 hybrid nanoparticles for solid-state Li-ion batteries
    Anji Reddy Polu, Shufeng Song, Aseel A. Kareem, Serguei V. Savilov, Pramod K. Singh, et al.
    Journal of Physics and Chemistry of Solids, 2025
  • Comprehensive Study of PAN-NaBF4 Solid Polymer Electrolytes: Insights Into Optical, Structural, Thermal, Electrical, and Electrochemical Properties for Sodium-Ion Batteries
    Mekala Venkanna, Pramod K. Singh, Hussein K. H. Rasheed, Aseel A. Kareem, Shufeng Song, et al.
    Energy Storage, 2024
    This research explores the use of solid polymer electrolytes (SPEs) as a conductive medium for sodium ions in sodium‐ion batteries, presenting a possible alternative to traditional lithium‐ion battery technology. The researchers prepare SPEs with varying molecular weight ratios of polyacrylonitrile (PAN) and sodium tetrafluoroborate (NaBF4) using a solution casting method with dimethyl formamide as the solvent. Through optical absorbance measurements, we identified the PAN:NaBF4 (80:20) SPE composition as having the lowest energy band gap value (4.48 eV). This composition also exhibits high thermal stability based on thermogravimetric analysis results. Electrochemical impedance spectroscopy reveals an ionic conductivity of 1.02 × 10−4 S cm−1 for the PAN:NaBF4 (80:20) blend at ambient temperature. Additionally, linear sweep voltammetry demonstrates its good electrochemical stability up to 3.22 V. We assemble a primary sodium‐ion battery using the optimal SPE composition (Na/(PAN + NaBF4)/(I2 + C + electrolyte)). This battery achieves an open‐circuit voltage of 2.83 V and displays promising discharge performance.
  • Conductivity enhancement in K+-ion conducting solid polymer electrolyte [PEG : KNO3] and its application as an electrochemical cell
    Anji Reddy Polu, Aseel Abdulameer Kareem, Kwangmin Kim, Dongkyu Kim, Mekala Venkanna, et al.
    Korean Journal of Chemical Engineering, 2023
  • Edge imaging characteristics of aberrated coherent optical systems by edge masking of circular apertures
    Computer Optics, 2022
  • Amplitude filters in shaping the point spread function of optical imaging systems
    M. Venkanna, D. Karuna Sagar
    Proceedings of SPIE the International Society for Optical Engineering, 2015
    We present our studies on apodization of pupils with various amplitude filters with respect to images of point objects. The central intensity distribution, first maxima and first minima are compared with and without apodisation. The effects of aberrations and aperture obscuration are also studied. It is shown that in certain cases, the aberrated images can be improved with the help of suitable amplitude filters.
  • Reduction in edge-ringing in coherent imaging of edge objects with amplitude filters
    M. Venkanna, D. Karuna Sagar, P. Predeep, Mrinal Thakur, M. K. Ravi Varma
    Aip Conference Proceedings, 2011
    The coherent edge‐response of optical systems apodised with amplitude filters has been studied. It is found that with high degree of apodisation, edge‐ringing can be appreciably mitigated. The analytical studies were made for circular aperture and annular aperture. Variable apodisation with the use of two different filters for various zones of transmission are also studied and it is found that this type of apodisation is more useful in reducing the ringing effect and also there is a perceptible increase in the edge gradient. Hence these amplitude filters are found to be effective in enhancing the resolving power aspects of edge imaging characteristics of optical systems.

RECENT SCHOLAR PUBLICATIONS

  • Structural and Electrical Properties of NaCl‐Modified Xanthan Gum Biopolymer Electrolytes for Energy Storage Applications
    AR Polu, M Venkanna, VR Jeedi, FM Hamzah
    Macromolecular Symposia 415 (1), e70206 , 2026
    2026
  • Inclusive Instructional Design Through Digital Pedagogies and Active Learning Approaches
    Rampelli Manojkumar, T. Aditya Sai Srinivas, Venkanna Mekala
    Practical Perspectives on Inclusive and Immersive Learning Environments 1 … , 2026
    2026
  • Solid Polymer Electrolyte for Solid-State Sodium-Ion Battery
    Venkanna Mekala, Anjireddy Polu, Kottapalli Sai Sravani , Maddula Sri ...
    IN Patent 57,437 , 2025
    2025
  • Advanced Engineering Physics
    MV B K Pandey, S Chaturvedi
    CENGAGE 1, 260 , 2025
    2025
  • Impedance and Electric Modulus Analysis of Sodium Ion‐Conducting PVA‐Based Solid Polymer Electrolytes
    AR Polu, V Sharanya, V Mekala, FM Hamzah
    Macromolecular Symposia, e70215 , 2025
    2025
  • Performance enhancement of PEO: LiDFOB based nanocomposite solid polymer electrolytes via incorporation of POSS-PEG13. 3 hybrid nanoparticles for solid-state Li-ion batteries
    AR Polu, S Song, AA Kareem, SV Savilov, PK Singh, M Venkanna, ...
    Journal of Physics and Chemistry of Solids 196, 112319 , 2025
    2025
    Citations: 15
  • Comprehensive Study of PAN‐NaBF 4 Solid Polymer Electrolytes: Insights Into Optical, Structural, Thermal, Electrical, and Electrochemical Properties for Sodium …
    M Venkanna, PK Singh, HKH Rasheed, AA Kareem, S Song, SV Savilov, ...
    Energy Storage 6 (8), e70103 , 2024
    2024
    Citations: 10
  • Silver Ion Conducting Solid Biopolymer Electrolyte and use of the same
    Anji Reddy Polu, S. Bhavishya , B. Sri Neha , N. Lalitha, L. Vaishnavi ...
    IN Patent 111,932 , 2024
    2024
  • Hybrid Nanocomposite Solid Polymer Electrolyte for Solid state Sodium -Ion Battery
    Anji Reddy Polu, Venkanna Mekala, Shufeng Song , Aseel A. Kareem, Pramod K ...
    IN Patent 68,491 , 2024
    2024
  • Solid polymer electrolyte for solid-state zinc-ion battery
    Anji Reddy Polu Venkanna Mekala
    IN Patent 50,013 , 2024
    2024
  • Nanocomposite solid polymer electrolyte compositions and the cells comprising the same
    Anji Reddy Polu, Venkanna Mekala
    IN Patent 48,583 , 2024
    2024
  • Engineering Physics
    B K Pandey, S Chaturvedi, M Venkanna*
    2024
  • Conductivity enhancement in K + -ion conducting solid polymer electrolyte [PEG : KNO 3 ] and its application as an electrochemical cell
    AR Polu, AA Kareem, K Kim, D Kim, M Venkanna, HK Rasheed, ...
    Korean Journal of Chemical Engineering 40 (12), 2975-2981 , 2023
    2023
    Citations: 32
  • Tailoring the light flux in the point spread function of defocused four-zone apodised apertures under the combined influence of primary spherical aberration and astigmatism
    DKS N.Sabitha, M. Venkanna ,S. Vidya Rani
    High Technology Letters 29 (9), 662 , 2023
    2023
  • Mitigation of Edge Ringing for the Optimization of Highly Aberrated Coherent Optical Systems
    P Shailaja, SV Rao, DK Sagar, M Venkanna
    Journal of Scientific Research 15 (3), 595-605 , 2023
    2023
    Citations: 1
  • Enhancing The Edge Imaging Characteristics By Variable Apodization Techniques Of Aberrated Coherent Optical Systems
    P Shailaja, S Venkateshwara Rao, D Karuna Sagar and M Venkanna
    Journal of Applied Physics 15 (4), 23-29 , 2023
    2023
  • Engineering of Aberrated PSF by Asymmetric Apodization with the Complex Shaded Aperture
    M Venkanna, N Sabitha, DK Sagar
    Journal of Scientific Research 15 (1), 121-129 , 2023
    2023
    Citations: 1
  • Synthesis and characterization of new solid polymer electrolyte (PEG+ CH3COONa) for solid-state sodium batteries
    AR Polu, V Mekala, T Ramesh
    Journal of Optoelectronic and Biomedical Materials Vol 14 (2), 63-67 , 2022
    2022
    Citations: 2
  • Edge imaging characteristics of aberrated coherent optical systems by edge masking of circular apertures
    M Venkanna, KD Sagar
    Computer Optics 46 (3), 388 , 2022
    2022
    Citations: 7
  • Metasurface Lens- New Building Block of Multifunctional Optics
    M. Venkanna, D. K Sagar
    Journal of Education 23 (10), 77 , 2021
    2021

MOST CITED SCHOLAR PUBLICATIONS

  • Conductivity enhancement in K + -ion conducting solid polymer electrolyte [PEG : KNO 3 ] and its application as an electrochemical cell
    AR Polu, AA Kareem, K Kim, D Kim, M Venkanna, HK Rasheed, ...
    Korean Journal of Chemical Engineering 40 (12), 2975-2981 , 2023
    2023
    Citations: 32
  • Performance enhancement of PEO: LiDFOB based nanocomposite solid polymer electrolytes via incorporation of POSS-PEG13. 3 hybrid nanoparticles for solid-state Li-ion batteries
    AR Polu, S Song, AA Kareem, SV Savilov, PK Singh, M Venkanna, ...
    Journal of Physics and Chemistry of Solids 196, 112319 , 2025
    2025
    Citations: 15
  • Comprehensive Study of PAN‐NaBF 4 Solid Polymer Electrolytes: Insights Into Optical, Structural, Thermal, Electrical, and Electrochemical Properties for Sodium …
    M Venkanna, PK Singh, HKH Rasheed, AA Kareem, S Song, SV Savilov, ...
    Energy Storage 6 (8), e70103 , 2024
    2024
    Citations: 10
  • Edge imaging characteristics of aberrated coherent optical systems by edge masking of circular apertures
    M Venkanna, KD Sagar
    Computer Optics 46 (3), 388 , 2022
    2022
    Citations: 7
  • Amplitude Filters in shaping the Point Spread Function of Optical Imaging Systems
    M Venkanna
    International Conference on Optics and Photonics 2015 Proc. of SPIE 9654 … , 2015
    2015
    Citations: 6
  • PSF with Partial and Variable Apodization along with CPF
    M Venkanna, DK Sagar
    International Journal of Engineering Technology, Management and Applied … , 2017
    2017
    Citations: 5
  • Reduction in Edge-Ringing in Aberrated Images of Coherent Edge Objects by Multishaded Aperture
    V Mekala, DKarunasagar
    Advances in Optics 2014, 7 , 2014
    2014
    Citations: 5
  • Synthesis and characterization of new solid polymer electrolyte (PEG+ CH3COONa) for solid-state sodium batteries
    AR Polu, V Mekala, T Ramesh
    Journal of Optoelectronic and Biomedical Materials Vol 14 (2), 63-67 , 2022
    2022
    Citations: 2
  • Mitigation of Edge Ringing for the Optimization of Highly Aberrated Coherent Optical Systems
    P Shailaja, SV Rao, DK Sagar, M Venkanna
    Journal of Scientific Research 15 (3), 595-605 , 2023
    2023
    Citations: 1
  • Engineering of Aberrated PSF by Asymmetric Apodization with the Complex Shaded Aperture
    M Venkanna, N Sabitha, DK Sagar
    Journal of Scientific Research 15 (1), 121-129 , 2023
    2023
    Citations: 1
  • Aberrated Edge imaging with annular apertures
    Narsaiah, M Venkanna, DK Sagar
    Journal of Applied Physics 6 (3), 5 , 2014
    2014
    Citations: 1
  • Optimization of Aberrated Coherent Optical Systems
    M Venkanna, DK Sagar
    Journal of Applied Physics 4 (6), 5 , 2013
    2013
    Citations: 1
  • Reduction in Edge-ringing in Coherent Imaging of Edge Objects with Amplitude Filters
    M Venkanna, D Karunasagar
    Optics-2011 AIP Conf. Proc. 1391, 3 , 2011
    2011
    Citations: 1
  • Structural and Electrical Properties of NaCl‐Modified Xanthan Gum Biopolymer Electrolytes for Energy Storage Applications
    AR Polu, M Venkanna, VR Jeedi, FM Hamzah
    Macromolecular Symposia 415 (1), e70206 , 2026
    2026
  • Inclusive Instructional Design Through Digital Pedagogies and Active Learning Approaches
    Rampelli Manojkumar, T. Aditya Sai Srinivas, Venkanna Mekala
    Practical Perspectives on Inclusive and Immersive Learning Environments 1 … , 2026
    2026
  • Solid Polymer Electrolyte for Solid-State Sodium-Ion Battery
    Venkanna Mekala, Anjireddy Polu, Kottapalli Sai Sravani , Maddula Sri ...
    IN Patent 57,437 , 2025
    2025
  • Advanced Engineering Physics
    MV B K Pandey, S Chaturvedi
    CENGAGE 1, 260 , 2025
    2025
  • Impedance and Electric Modulus Analysis of Sodium Ion‐Conducting PVA‐Based Solid Polymer Electrolytes
    AR Polu, V Sharanya, V Mekala, FM Hamzah
    Macromolecular Symposia, e70215 , 2025
    2025
  • Silver Ion Conducting Solid Biopolymer Electrolyte and use of the same
    Anji Reddy Polu, S. Bhavishya , B. Sri Neha , N. Lalitha, L. Vaishnavi ...
    IN Patent 111,932 , 2024
    2024
  • Hybrid Nanocomposite Solid Polymer Electrolyte for Solid state Sodium -Ion Battery
    Anji Reddy Polu, Venkanna Mekala, Shufeng Song , Aseel A. Kareem, Pramod K ...
    IN Patent 68,491 , 2024
    2024