You have to just open the research paper that you want to downoad and then copy the URL. Then open another tab and type "sci-hub.cc" now paste the copied URL into block and press open. You will get the research paper that you want. You can now also download paper.

I will show you two ways to download this papers for “free”.

1.By using links:-
 
These links will work only for IEEE papers.
Step 1: Go to http://ieeexplore.ieee.org/and Select your paper, and see the URL of that page

Step 2: Copy the arnumber and replace it in the place of xxxxxxx in the below link
[Please try all those links]

Link 1: http://ieeexplore.ieee.org.sci-h...[Select and Copy the link And Replace XXXXXX with arnnumber]

Link 2: http://ieeexplore.ieee.org.sci-h...[Select and Copy the link And Replace XXXXXX with arnnumber]

Link 3: IEEE Xplore Digital Library.sci-hub.club/xpl/art­icleDetails.jsp?arnumber=xxxxxxx [Select and Copy the link And Replace XXXXXX with arnnumber]

2. In this second method you don’t have do anything just copy and paste.

these links will give you everything you want,
http://sci-hub.cc/
http://sci-hub.bz/
and follow this website –> https://new.vk.com/sci_hub for more information.
First method is part of this website (use first method when this websites are not working).
Now i will show you how to download papers using this websites:

For IEEE papers follow below steps : –

1.Go tohttp://ieeexplore.ieee.org/Xplor...
 
2. Search the paper you want to download.

3. Open the paper link you want to download and copy the whole link

4. Now open any of this website
http://sci-hub.cc/
http://sci-hub.bz/

5. Now paste the paper link into URL box and click open, sometimes it will directly get downloaded and sometimes pass the CAPTCHA.

For ScienceDirect Papers follow the same procedure:-
  1. link — >http://www.sciencedirect.com/
2. Copy the paper link you want to download and paste in the URL box

For Springer follow the same procedure:-
  1. link –> http://www.springer.com/gp/produ...
2. Now paste the paper link into URL box and click open.

For ACM Papers follow the same procedure:-
  1. link –> http://dl.acm.org/
2. Now paste the paper link into URL box and click open.

For Wiley Papers follow the same procedure:-
  1. link –> http://onlinelibrary.wiley.com/
2. Now paste the paper link into URL box and click open.

Extra :-

Springer has allowed some of its Books for free to download, you can download from below github link (mostly contains MATHS Books).
link –> https://gist.github.com/bishboria/8326b17bbd652f34566
You will get the research paper that you want.
Download Research Papers For Free From IEEE, Springer, ScienceDirect, ACM, Wiley…
This is a good blog written by my friend Anand. You can also go through it and see alternative options to download “research paper” of ieee, springer and all other journals.
Thank you.